Attachment 0001- MIL-DTL-156 B dated 18 April 1956.pdf

MILITARY

MIL-P-156B

18 APRIL19SS

SUPERSEDING

JA,N-P-lSdA 9 JULY194d

SPECIFKATfON

POTASSIUM NITRATE

Thu #PC@cntion hin been awrmed bu Uw D8PIr@unt of Defeme and k q.

&CLW for wo bu tha DePzrtntcnto Of lb Annv, th Naw, and tftdAir Fvtw.

1. SCOPE

1.1 Scope. This specificationcoverspo-

tsssiunnitrateforuse in the manufacture of pm@lante, cheraicnl munitions, and pyrotechnic compositions.

1.2 (bssitiention. Potassium nitmte shall be of the following chase% os speeitled (see

6.1 and 6.2) :

Claw l—for use in black powder and ehemicsl munitions.

CJae9 2—for use in pyrotechnic com-petitions.

Class S-for use in pmpeltanta.

2. APPLJC4RLE f)ocunlEN19

2.1 The following specifications a n d

stanti of the issue “in tied on data of invitation for bids, form a part of this apeeification:

SPEUPICATION

FEmeAL

RR-S-366 -Sievq .%andnrd for Testing purposes

MILTrAav

JAN-P-1 18 —Packaging and Packing for Overseas Ship-ment-Baga, Shipping, Textile, and Paper- Lnminnted

BfIL-G2650 -0 en eral Specification for Ammunition Ex-cept Small Acme Ammunition

STANOAROS

MDJTABY

MIL-ST>lZ9-Bfarkiog for Shipment and Storage

(C.JpiaofOpaiacations,ntandndn..iraG and PubIknUonn,rcquhedby mntructam& mnnectlon whh s@Rc Pmmrmnent fumtfom abmld be ob CQJnalfromthe Praurins activityor andirected by tbe centrncting OSlrer.)

2.2 Other publications.The following

documentformsa portofthisspecification.

Unlessotherwiseindicatitheissuein effect on dote of invitation for bide ehaU apply.

INTERSTATE f3MMEJUX COMMISSION

49 CFR 71-7*Intemt8te Commerce Cam@eafon Rules

f. and Regufetionafor the ‘PramporMirm of Explmiwe and Other Dangerous Articles

(TheInt.matateCammermCOrmnlsskmrexnlutions IUSnowa partoftheCadoofFederalResuldons (1949Edition-tlevlmd19s0)nvannblefrumCJts Superlntrndmt@fOamrmm, Covernmcut Prfnt@ Om~ Wanhln@n2S,D. C. Ordersfor tAeutme VII)IICSMOMnhould Cb “49 CFR 71-TS (Rev 19s0).“) .

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MIL+-156B

.3. REQUIREM&PS

3.1 Chemical requiremen!e. Potassium

nitrateshallcomply with the chemical r~ quirements specified in table I, when de-termined as specified in the applicable para-graphsofsection4.

T.mm I.Chmical r.quirmeati

-, C’IMI1

P41c.nl

MO~tw maximum (mm)_ 0.2

A&Uty__ Nom Alkdinity._.—_._— Nom Wakx inmlubla rnakid (mnx.).. 0.1 Gri4- None Cbloridea, us potamium dhidc–

0K3), (IMx.) —.._ 0.07 Cblorr.tea cad percblomttq M pntnmiwll psrchlol’nte

(KCI04),(lllr.x.). ....._ 0,5 Imn r.nd Aunirwo, u oxide, (lax.)______________ 0.5 Calcium and mq+ntium, as oxides, (IMP. ) .. ..._ . . . ..-._. 0,5 fkdium,M oxides,(mnx.)_____ 0.2.5 Ammmium c.ompunda_______ Nom N1trOgen,minimum (min. ) ...... .._ 13,77

Cklz

G

0.2 None No..

0.1

None

0.07

0.5

0,5

0,6 0.25 None 13.77

Clsms P-

0.2

NOIM

None 0.1

Nom

0.07

0.5

0,5

13,77

3.2 Odor. The potassiumnitrateshallbe

odorless.

3.3 GJor (crystals).White.

3.4 (%arudnlion.

3.4.1 Cfuss 1. Claae 1 potassium nitrate

shallbe furnishedinlump form.

3.4.2Class.2and S. Close2 and 3 pots% sium nitrate shall comply with the granu-lation requirements shown in table II, using

UnitedStates(U.S.) Standardsievescon-forming to SpecificationRR-S-366, when testedasapeeifiedin4.4.13.

TASLC 11. Granulation requiremmb (dam 9 and S)

Siever.umhr (No.) Pcrcc.t,min..throughwecificddare

CLV.1 Clw#.!

cm 09,9 eo .. . ... ... 99,0

100 40 ..—.-..

4. QUALITY ASSURANCE PROVISIONS

4.1 Lat.A lotshallconsistof material

from thecame batchorblendingoperation, and subjetted to the same processing opera.

tions and conditions (see 6.3).

4.2 Sampling. Ten parcentof the con-

tainerinthelot,butinno -e ~om tin 10 nor lesethan 3 container,shallbe selected30astoberepresentativeofthelot.

Iftherearelessthan3 containerin the lotj all the contakrers shall be sampled. The mat-erial shall be mixed to a uniform consist-ency thro~ghout, and approximately 8 ounces of it shall be taken from each aelccted container. The primary samples shall be placed in eeparate airtight contafnera, labeled so that the container from which each eample was taken can be identified. A composite sample, of approximately 8 ounces, eball be made fmm equal portions of the primary samples. The composite sam-ple shall be thoroughly mixed and placed in an airtight container, labeled to show the name of the material, manufacturer, plant, contract or purchase order number, and lot SiZe. Al] acceptance tests shal] & made on the composite sample. However, if it be comes apparent during eampling that the lot is not uniform, it may be required that any primary sample be t-ted for compliance with the requirements of this epwification.

Allprimarysamples shall be held for poaei-ble future examination should the composite sample fail to comply with the requirements.

4.3 Inspection.

4.3.1 Gsnerwl. Inspection shall be as

specified in Specification MIL-f&2550 and as specified herein.

4.3.2 Pocking and marking. It shall be

ascertained that the packing of the potaa-eium nitrate and the marking of the con-tainer confornr to this specification.

4.4 Test procedures. The determinations

shall be conducted as follows:

4.4.1 Determination of moisture. Dry an

accurately weighed portion of approximately 10 grams (gin.) of the sample in a tared dieh at 150 * 2 degrees (0) Centigrade (C.) to conetant weight, cool in a desiccator and weigh.Calculatethehe in weight ne percent moisture.

4.4.2 Detenninatien of aeidit~. Dissolve

a weighed portion of approximately 1 gm.

of the earnple in 20 millilitere (ret.) of neu-tral dietiiled water and determine if eeneitive blue litmus paper ie changed incolorwithin 3 minutes, when imrneraed in the ecdution.

The blue litmus paper shall be considered to be sufficiently seneitive if it chows a distinct reddieh coloration, after bchg imroereed for 3 minutes in .0001 normal (N) hydrochloric or nuhric acid.

4.4.3 Deter-minatian of alkalinity. Ueing

the eo;ution from the acidity teet determine if seneitive red litmus paper ie changed in color within 3 minutee, when imrncraed in the eol@iOn. The red titmus paper ehall be considered eensitive enough if it ahowe a dietinct biuieh coloration, after being bri meraed for 3 minutee in .000IN eodium hydroxide.

4.4.4 Determination of in.roluble mater+rl.

Dieaolvea weighed portion of approximately 10 gm. of ‘Ae enmple in 100 mt. of boiling dietiiled water and filter the solution through a tared tlitering crucible. Wneh the ineoluble reeidue on the filter with hot water. Dry the crucible and contents at 100° to 105°C. for 3 houre, cooi in a deeiccotor, and weigh. Cai-cuiate the incrcaae in weight cc percent in-scduble material.

4.4.5 Detenninatien of grit. Dbeolve a

2Sgm. partionoftheemnple in water, tiiter through a medium porosity fliter, and waeh thomugtdy. Trmwfer any nratericl retained on the filter to a smeoth glaee slide. Preea and rub the material with a ernooth steei spatula against the glase elide. The preeence of grit ie indicated by the persistence of a acrntching noise.

4,4.6 Detenniaation of chion”dee. Die-eolve an accumtely weighed portion of op-pmximately 5 grn. of the enmple in 100 ml.

of dietilled writer and make the eolution slightly acid with nitric acid. Add a few

MILP-1569 -

dmpe of nppmximately 0.25N silver nitrate 8olution. If more than a faint opnieecence reeuite, add more silver nitrate eolution until precipitation is complete. Boil for 2 rninutea with constnnt stirring, and aiiow tbe precipi-tate to settte overnight in a dark piace.

Decant the eolution through a tared tittering crucibie. Wneh the precipitate four timee by decnntotion, using 20-mL porttone of water containing 1 mL of concentrated nitric acid and 2 dmpe of silver nitrate eolution per 100 m{. Transfer the precipitate to the cru-cible with 20 ml. of the ecme wmh ~a~r, wneh it with 20 rni. of l-percent nitric acid eelution and with two 20-enl. porttone of dietilled water. Dry the crucible and precipi-tate for 4 houre at 186°C., cool in a deaic-cntor, and weigh. Calculate the percent chloridee, oe KC],ne follows:

Percent KCI = 62A w where:

A = weight of precipitate, in gm.

W = weight of sample, in gm.

4.4.7 Determination of chiaratee and per-

chbra.te8. Tranefer an accurnteiy weighed portion of approximately 2 gm. of the cam.

pie to a platinum crucible, and mix wtth aPPmxhnately 10 8m. of cnhydroue eodium cnrbonate. Cover the mixture with a kyer of 80diUm carbonate, fu, ~d COOLD~]ve the fused w in disMfed water, render the 60]Uti0n aiight.ly acid with fitric ncjd, ~d proceed with the precipitation ae deecribcd in paragraph 4.4.6. Caicufete the percent total chforatec and pcrchioretee, ae KCIO,, oe follows:

Percent KC1O, = 9’7(A-o.019BW) w where:

A = weight of precipitate, in grn.

B = percent K(J oc -jn~ ~

4.4.6.

W = weight of emnpl~ in gnr.

4.4.8 Detenninntien of iron and alumL

num (applicable to dae8e8 1 and 1? ordu).

Diseolven weighed portion of approximately 5 gm. of the eample in dietilled water and

I

N’IIL-P-156B

filterthe solution.Acidifythe filtratewith nitricacid,add a elightexcessofammonium hydroxide,and boil.Catch the precipitate on theashlessfilterpaper and wash with hot distilledwater.Retainthetiltrateand waah-ings for furtheranalysis.Ignitethe filter paper and precipitate,in a tarad porcelain crucible, to constant weight. Cool the cruci-ble and contents in a desiccator, and weigh.

Calculate the increase in weight aa percent iren and aluminum oxides.

4.4.9 Determinatiera of calsium and mag-

nesium. Dilutethe combined filtrateand washingsfrom thedeterminationofironand aluminum (eee 4.4.8)to approximately200

ml. and boil. Evaporate the filtrate to a volume of about 20 ml., filter, and add 15

ml. of 9N monium carbonak solution, and 15 MI. of 95-psrcent ethyl alcohol. Affow the mixture to stand for at least 30 minutes, with frequent etirring. Filter through paper and wash the precipitate with 9N ammonium carbenate solution. Dissolve the precipitate in dilute hydrochloric acid, dilute to approxi-mately 50 ml., boil, and add 1 ml. of satu-rated ammonium oxalate eolution. Allow the solution to stand for 12 hours, filter through a tared filtering crucible, and waeh the pre-cipitate with hot water containing amrne-nium oxalate. Ignite the precipitate, gently at first and then with a blast lamp, COO1the crucible and contents in a desiccator, and weigh. Calculate the increase in weight as percent calcium oxide. Concentrate the fil-trate from the calcium determination to approximately 50 MI., add 10 ml. of a 10-percent solution of ammonium phosphate, and 20 ml. of a lo-percent solution of ammnnia. Allow the solutinn to stand for 4 or 5 houra, filter through a tared filtering crucible, and wash with a 2.5-percent solu-tion of ammonia. Dry the precipitate and ignite to constant weight with a blast lamp.

Cool the crucible and contents in a desic-cator, and weigh. Calculate the increase in weight as percent magnesium nxide, as follows :

Percent magnesium oxide = 36A F where:

A = weight of precipitate, in gm.

W = weight of sample, in gm.

4.4.10 Determination of sodium (applicb

ble to cla.wee 1 and 2 only).

4.4.10.1 fifagnesium uranvl acetate re-agent. Prepare solution A by dissolting 90

gm. of uranyl acetate, UO, (C,H,O,) ,.2H,0, and 60 ml. of glacial acetic acid in sutllckmt distilled water to make a volume of 1 liter by heating to 70°C., and stirring until solu-tion is complete. PreDare solution B by &w solving 600 gm. of magnesium acetate, Mg (C,H,O,) ,.4H,0, in 60 ml. of glacial acetic acid and sufficient distilled water te make a volume of 1 liter by beating to ‘70°C., and stirring until eolution ia complete. Mix together solutions A and B while at 70”C.

and cool the mixture to 20”C. After alhnv-ing the mixture to etand at thii temperature for at leaat 2 hours, filter it through a dry filter paper into an amber-colored bottle.

Store the bottle contahing the solution where it is not exposed to direct mmlfght.

If a precipitate appears on standing, filter the solution again prior to use.

4.4.10.2 Alcohol wash liquid. Prepare an

alcohol waeh liquid aa follows: Shake 1 ml.

of l-percent sodium chloride solution with 25 ml. of marmeeinm uran~l acetate r~ agent. Catch the precipitate on a filter paper and wash thoroughly with 95-percent ethyl “.

alcohol. Mix the precipitate with 1 liter of 95-percent ethyl alcohol and allow to stand for 1 hour, with frequent ehaking. Filter the solution and use the tiltrati as a wash liquid.

4.4.10.3 Procedure. ‘hansfer a weighed

portion ofapproximately 0.2 gm. ofthesem-ple to a 150-mf. beaker. Dissolve it in 5 ml.

nf distilled water and cool the solutinn to 20°C. Add 100 ml. of the magnesium uranyl acetate resgent which has previously been cooled to 20°C. While maintaining the tem-perature at 20”C., rapidly stir the contents of the beaker for l/z hour by means of a mechanical stirrer. Transfer the precipitate to a tared filtering crucible, using a toteI nf

25 to 30 mf. of the wnah liquid for tranafer-ing and wosiling the precipitate. Dry the crucible and precipitnb nt 100° to 11O”C.

for1Ahour,cardin a desiccator, and weigh.

Calculate the weight of the magneeiom sodium uranyl acetate, MgNn(UO, ), (C3,0,)..6% H,O, uc percent eadium oxide, ea followe:

Percent eodium oxide = 2.06A T where:

A = weight of precipitate, in gm.

W = weight of eomple, in grn.

A4.11 Determination of ammenium com-pounds (applieabla to clam I and 2 onfv).

Tmmefcr an accurately weighed portion of nppmximatiy 1.0 gm. of the eanrple to n 150-ml. beaker, diaeolve in 25 ml. of di% tiifed water, nnd add sutllcient cxceee of cen-centrnted sodium hydroxide solution to ren-der the potseaiura nitrate solution alkaline.

Heat the mixture nnd teet the vapere with a moist *.p of red litmus paper of euch sen-sitivity that it changee color in 30 scconde, when imnmreed in 0.0005N alkali and atirmd contirmoual?. Care ehould be taken that no spray fmm the solution touchee the teet paper. Note if any ammonium com-poundeare Frcxentin theaornple,ae indi-catedby thepaperbecomingblueincolor.

4.4.12Detenninotien of nitregerb.

4.4.12.1Standardization of th nitrOrn-eter.

4.4.12.1.1Absolute method. Aaaernble the nitrmneter (duPont or equivalent) after thoroughly clenning and drying all parta The vnrioue pnrta, with the exception of the

MIhP-156B recervoir bulbs, are completely filled with mercury. Place 25 ml. of 94.5 * O.S-percent sulfuric acid in the generating bulb, draw air into the bulb to nwmly the ievel of tbe lower ahouider by lowering the mercury reservoir and opening both a@coclm Close both stopcocke and ehnke vigomnaly for 9 rninutca. Connect the generating bulb into the compenenting tube by adjuetrnent of the two mercury rccervoire,. keeuing open the stopcock of the meamming tube. Continue the introduction of the air until the mercury in the reading tube ie approximately at the

12.50 mark. Seal the commenting tube by meane of a arnnll blowpipe flame. Dcaiccete eimilariy, in the generating bulb, another portion of the air and tranafer thie to the reading tube until the mercury in the read-ing tube, compenaoting tube, and their mercury remrvoire ia at tbe came levef, the mercury in the reading tube bcii nppmxinmtely at the 12.S0 mark. (It ienot n“tmaeary that these gae volmnee be exact ar wofd.) FW a“aroall U-tube manome-ter vrith suiforic acid and” attach @ the rending tube. Allow the appamtue to come to conetant tempemtum nod then adjuat the mercury levele in the reading tube, compen-sating tube, and their mercury renarvoire co that the air in the reading tube ie under ntmoepheric preaeurc, ee shown by the ecfd Ievele in the arm of the mcmmncter tube.

Take the rending on the graduated ecafe of the caiibmted reading tube, and at the acme time note the temperature and barometric prcacure. From theee madinge crdcufate the volue of air at 20°C. and 760 raillimeter (MM.) prexeure in the reading tuLw, cc follows:

V = R P X 299 (1-O.00018t) 0.3669 PR (1-6.00018t)

’760 (279 + T) (1-0.00018 X 20)= 273 +-T where: t = temperature of the barometer, ‘/ = rd. Of air at 20°C. and ’760mm., in ‘C.

Immmeter at 20”C. 0.00018= coet%cientof expxnaion of mer- R = m{. of air at the observed tera- cury in gfaee peraturc (70°C.’) and at tbe obxerved prcaaure, P, (in Adjuet the heights of the readtng tabe, cmn- -.) . penenting tube, and their reeervoim co that, RillbP-156B with the mercury in the reading and com-pensating tubes on a level, the mercury in the re.iing tube marks the calculated vol-umeof the air. Peetea strip of paper on the tube so m to mark the height of the mercury in the compeneding tube. Consider this as the standard volume of air with which every volume of gas, to bemeatmred, is compared.

(Nob.Thcnm of dry air tends ta form a ricum nmund the r-ding level of the mmpensntin~ tube, thun requiring frequent rentandnrdizntion of tha nitmmeter. This mum ia cnumd by reaction of ow%en in tie nir with mercury, or by impuritim Dry nitrogen eliminntcs the condition md nhould hc wsd, if m’ailablc. A halfdrop of mdfurie acid will ntw prcvrmt this WML)

4.4.12.1.2Potassium nitrats method. R* cryatzdfize three ties, from 95-percent alcc-hol, a sample of reagent grade potassium nitrate, and grind this to pass through a U. S. Standard No. 100 eieve. After drying at 135° tn 150”C. for 2 or 3 hours, weigh a portion of exactly 1 gm. into a small weighing bottle and tranafer this portion to the cup of the generating bulb. Wash the potaeaiumnitrateintothe generatingbulb by means of eighttoten portionsof 94.5~ O.&percent nitrogen-free sulfuric acid cooledto approximately5“C.,using a total volume of 25 ml.oftbeacid.With thelower stopcockof thegeneratingbulbopen and the mercury reservoir low enough to maintiln a slightly reduced pressure in the generating bulb, shake the sample until most of the Baa hae been generated. Adjust the mercury reservoir until the mercury drops nearly to the lower shoulder of the generating bulb.

Close the lower stopcock and shake the bulb vigorously for 3 minutes. Replace the bulb on the rack, open the lower stopcock, and allow tbe tube to stand for 5 minutes, the levels in the generating bulb and reservoir being approximately the same, having previ-ously introduced desiccated air into the com-pengatin~ tube ae described in 4.4.12.1.1.

Close th; lower stopcock, and shake the gen-erating bulb for 1 additional minute. Trane-fer the gas to the reading tube, and adjust the levels of the mercury in the reading and compensating tubes to approximately the came height. Allow the gas to stand for approximately 20 minutes, to permit equsfi. ● zation of the temperature. With a sulfuric acid U-tube leveling device make careful ad-justments, sn that the mercury in both tubes is at the same level, and the mark in the reading tube is at the 13.85mark (theper-centageof nitrogenin potassiumnitrate).

IJakea mark on thecompensatingtubeto show the volume occupied by the air equiva-lent to the volume of nitric oxide gas liber-ated from exactly 1 gm. of potnssinm nitrate.

(This mark may be made on a strip of gummed paper attached to the compensating tube.)

(IVoto1. fn order to avoid any doubt regm’dii the purity of the Pots.mi”m nitrntc, it in denimble to chsck the stsndnrdization obtaimd by the ma of potamiumnitrateby meam of the nbenl”temetiwd.

Iftheagreementiswithin one or two hundredths of one percen~ the potassium nibnta am be cnn-nidd as of satisfactory qwdity and used in jmb-wquent periodicnttmdnrdi~tionu It has bcsn found by nctutd experimentation that the sol”bility of nitric oxide in wlfuric acid, of the ntrer@h p= m’ibed, in so smnll that no correction need be applied ta bring the vnlun in ngrccment with tbe mnr~ net by tbe nhaolute method.)

(Nota 2. If the nitmmeter k standardized by both the nbml.tc and potassium nitrate mcthoda, the re-mdbl may not be in agreement by 0.01 to 0.04.

percent nitrogen due to .qmnsim of the brass barometer scale. Such differmce may be removed by aPPk@ the braen scale correction corresponding ta the temperature (see 6.4). )

4.4.12.2Procedure. Cmsh a portion of approximately 3 gm. of the samplesothatit will peas through a U. S. Standard No. 100 eieve, and dry for 2 hours at 150°C. Accu-rately weigh approximately 1.0 gm. of the dried sample and transfer itto the cup of a standardized 5-part nitrometer (duPont or equivalent). Measure into a small graduate, 25 ml. of nitrogen-free 94.5 ~ 0.5-percent sulfuric acid cooled to approximately 5°C.

Wash out the weighing bottle into tbe ni-trometer cup with 5 ml. of the sulfuric acid.

Lower the mercury reservoir sufficiently to maintain a reduced pressure in the generat-ing bulb. Open wide the upper etopcock and open the lower stopcock efficiently to draw the acid mixture into the generating bulb.

Make successive 4-ml. rinsings with the rest

P

B of the sulfuricaciduntilithoe allbeen drown in. Close the upper stopcock, leaving the lower one open, end adjust the mercury rcaervoir just low enough to maintain n otightly reduced pressure in the generating bnfb. Shake the bdlr gentty ontit rnmt of the one hoe been genernted. Lmver the mer-cury reservoir until the level of the mercury in the generating bolb io at the heightofthe lowershoulder,then ctesetbe Ioweratop.

cecb and shake vigorouslyfor 8 minuta Replace the bulb on the rock, open the lower stopcock, and adjuat the mercury reservoir until the mercury in the generating bulb iu nt npproximntely the amne height oe the mereury in the reservoir. Thin will brfns thepressure inside the generating bulb to npprmdmn~ly one atmnsphera and the ooht-bilib of the nitric oxide gna in the aulfurfc acid will be normal. Close the lower stop crick and shnke the bulb vigororraly for m additional 1 minnte. Tranafer the gne to the measuring tube and adjust the levels of the mercury in the mmpenssting ~d meoaurin8 tubes to nppmxirmtely the same heighk Let the goe stand for 20 minutes in order to per-mit equalizetien of the temperature of the gne in the two tubes, and adjust the mer-cury levels closely with a sulfuric ncfd U-tube leveling device, the mercury level in the compensating tube being at the otnndnrd volume mark. Calculate the Wrcent nib gen uc follows:

Percent nitrogen = R w t where:

R = resoling of the measuring tube.

W a weight of emnple, in grn.

4.4.13Grumdation. Neat the apecifh?d sieve or sieves (see tnbleII)on a bottom pan.P1acea weighed Wrtion of 100 gm. of the anmple on the upper sieve, cover the sieve mrd sheke the osmmbly for 10 minutes by hnnd, or for 5 minutes by menne of a mwhnnicel ehuker, geared te produce 300 & 15 gyrntione and 150 a 10 tnpc of the striker per minute. Weigh the Iunounta n tnined or poaaing through the eievee, nnd cnlculnte to percentages oa required.

IMlilL4-l&@3

45 Remt cd rcjmtlm. If the Cmnpodta OMUP1Oor w Primary UMUP1Ombjccted to te3tfnila bJp2c3tl!e tc2t&tbaiatahnll ba rejected. The contrnctur uhnS bnve &-optinn nf having n pnrtinl or compteta nn&-siornade onsnmplmtnken from nlfornny of the corhinem in the lot at no expense to the Gevernmenk TIM contractor may thao remove the defective portionn of tbe lot and reautmdt the lot for acccptmrce. Tba re3ut9 mitted lot ohnll b ncqlti, provided that the new OMOPIQcckcted fn cccmdnnce with 4.2jgcminU thatdarc@rwtbythio apeci-flcntioo and that three nddittmml primnry ~Plm POSOanY test or tcda fai!cd by tho motel-idonoriginalMlbndKdoa.

5. !A!mP.mATmN Gum I.tzammm

.s.1 R2tIii. Uobl Othcrwiae a-in tho contrnct or wrier, potassium nitmta ehnllbe pnckedin nccordnnce witbticam-mertcal prnctice, in taxtibnnd-poper lmni- MtCd dd@l’ls bUfJJ COllfO170fllg to Speciftco-tion JAN-P-119, or in drumo or barrete.

Drurne or bnrrele of wood conatmction ohd be lined with a water-proof, creped, bag-type liner. AU contoinere ahnll conform to the requirements of Interntnte Commerce Canrnimfon (ICC) Re@atione for tmns-pat.otfon of potnodmn nitrote oe stipulated in Cede of Federal Regulntfona 49 CFR 71-

78, on au to iOSUrO acceptance by common O?

other cnrrtem for cafe tmnaportotfon at the lowed mte to the point of delivery.

5.2 Mddng. In ndditton to any opecinl

marking required by tbe contract or pur-cheae order, ahipmente ehnll be msrked in accordance with ICC Reguldfone and with Stendard MIIAiTD-129.

6. N(Yf733

6.1 Ordering dntn. Procurement decu-

ments should specify the following:

(a) Title, number, nnd date of this Sp=ifimtion.

(b) Clam of material required (see 1.2).

MIL.-P-156B

“6.2Classiti&tirm crew-reference. ‘l!he classes of potassium nitrate under this speci.

fication are equivalent tu the chwses covered by Specification JAN–P–156A, as follows (see 1.2) :

I dfIL-P-ls8B JAN-P-156A Clsss 1 Class A class 2 Claes B class 3 Class C

6.3 A batch is defined as that quantity

of material which has been subjected tu some unit chemical or physical mixing process intended to make the final product substantially uniform.

6.4 An explanation of the procedure for

making a brssa scale correction will be found in Lange’s Handbook of Chemistry, page 1368, Fifth Edition (1944) (see nob 2 in paragraph 4.4.12.1.2).

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