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31 APPENDIX C DUSTS WITH CLOUD IGNITION TEMPERATURES LOWER THAN THEIR LAYER IGNITION TEMPERATURES ~ ~ _ Bureau of Mines Report of Investigations Reference L~e flub Nader in Refer Once . . . . 6 59 8 8 8 8 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 ;:~ .~ :~: : ~ :: ~ 7 ~ F:~: : W . Material 9 59 70 88 149 60 93 122 143 182 and 183 201 208 228 273 1 5 6 7 8 12 29 33 35 84 123 124 Asphalt, blown petroleum resin Dextrin, USP Detergent Soap powder Anthracene and potassium per chlorate Aluminum Monochlorotrifluoroethylene -polymer Styrene-hydrocarbon monomer copolymer Vinyl multipolymer contain- ing monomeric vinylidene cyanide Urea-formaldehyde molding compound Phenol-formaldehyde deriv- ative Gum, manila Sodium resinate Styrene-maleic anhydride copolymer Para oxybenzaldehyde Aluminum, atomized Aluminum, atomized Aluminum' atomized Aluminum, atomized Aluminum, atomized Aluminum, atomized Aluminum, atomized Aluminum, atomized Aluminum, atomized Aluminum, fluid milled Iron, carbon reduced Iron, carbon reduced Ignition Tem- nerature . C Cl oud Layer 550 510 410 540 430 530 550 600 460 500 490 440 570 600 700 660 720 470 510 530 460 480 360 390 380 480 470 490 380 650 550 700 640 640 790 830 700 700 550 450 450 430 760 840 ; . .. . 740 ~~ art: ~ ~ ~~- ~ ~- ~:~ it_ ~ ~ I::

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~32 Bureau of Mines Report of Investigations Reference L~e Numb NO in Reference . 5 5 5 5 5 5 5 5 5 5 5 5 5 5 7 7 7 7 7 7 7 7 7 7 7 3 3 3 167 176 177 190 194 195 202 204 205 241 249 266 281 311 4 7 44 55 56 61 63 77 83 101 112 132 140 171 174 178 179 180 Ignition Tem- perature, C Cloud Layer 450 780 850 270 330 470 380 440 480 870 430 690 370 330 560 560 420 Sulfur 210 Sulfur 190 Alkylarylsulfonate, sodium 540 Amino acids 670 2-Amino-5-nitrothiazole 400 Duomycin fermentation residue 550 Vitamin B2 powder 500 Diazotized meta-nitro-para 380 Manganese, Silicon, milled Silicon Thorium Titanium Titanium Titanium Titanium, Titanium, electrolytic hydride hydride A ~ um' num-~ron alloy Aluminum-magnesium alloy, milled Calcium sit icicle Ferrotitanium, Manganese ore, Aluminum acetate i3enzolc acid Stearic acid low carbon sulfide toluidine coupled with beta naphthol Benzethonium chloride 380 DichlorodiphenyTtrichioro- 650 ethane (DDT) Sodium 2, 4-dichlorophenoxy- 580 ethyl sulfate 3,4,5,6-Tetrahydro-3,5-di- , , . ~ - - -, methyl-2H-1,3,5-thiadia- zine-2-thione Sucrose, chemically pure Sugar, powdered Sugar, raw, light brown 310 420 370 350 470 950 900 280 510 480 660 500 540 900 480 800 400 350 640 680 440 260 220 570 700 410 600 510 410 410 700 600 330 470 400 460

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