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510 . * Methyl parathion; O,O-Dimethyl-0-para-nitrophenyl--
<br /> phosphorothioate (X)
<br /> 511 . Methyl propionate (I)
<br /> 512 . * Methyltrichlorosilane (X, C, I,R)
<br /> 513 . Methyl valerate, Methyl pentanoate (and isomers) (I)
<br /> 514 . Methyl vinyl ketone, 3-Butene-2-one (X, I)
<br /> 515A. * Mevinphos, PHOSDRIN, 2-Carbomethoxy-l-methylvinyl
<br /> dimethylphosphate (X)
<br /> 515B. * Mirex; 1, la, 2, 2, 3 , 3a, 4, 5, 5, 5a, 5b, 6-Dodecachlorooctahydro-
<br /> 1, 3 , 4-metheno-lH-cyclobuta (cd) pentalene,
<br /> Dechlorane (X)
<br /> 516 . * MOCAP, O-Ethyl-S, S-dipropyl phosphorodithicate (X)
<br /> 517 . Molybdenum (powder) (I)
<br /> 518 . Molybdenum trioxide, Molybdenum anhydride (X)
<br /> 519 . Molybdic acid and salts (X)
<br /> 520 . Monochloroacetic acid, Chloracetic acid, MCA (X, C)
<br /> 521. Monochloroacetone, Chloroacetone, 1-Chloro-2-propanone
<br /> (X)
<br /> 522 . Monofluorophosphoric acid (X, C)
<br /> 523 . Naphtha (of petroleum or coal tar origin) , Petroleum
<br /> ether,
<br /> Petroleum naphtha (X, I)
<br /> 524 . Naphthalene (X)
<br /> 525 . * alpha-Naphthylamine, 1-NA (X)
<br /> 526 . * beta-Naphthylamine, 2-NA (X)
<br /> 527 . Neohexane; 2, 2-Dimethylbutane (X, I)
<br /> 528 . Nickel (powder) (X, I)
<br /> 529 . Nickel acetate (X)
<br /> 530 . Nickel antimonide (X)
<br /> 531 . * Nickel arsenate, Nickelous arsenate (X)
<br /> 532 . * Nickel carbonyl, Nickel tetracarbonyl (X)
<br /> 533 . Nickel chloride, Nickelous chloride (X)
<br /> 534 . * Nickel cyanide (X)
<br /> 535 . Nickel nitrate, Nickelous nitrate (X, I,R)
<br /> 536 . Nickel selenide (X)
<br /> 537. Nickel sulfate (X)
<br /> 538 . Nicotine, beta-pyridyl-alpha-N-methyl pyrrolidine (X)
<br /> 539 . Nicotine salts (X)
<br /> 540 . Nitric acid (X, C, I)
<br /> 541 . Nitroaniline, Nitraniline (ortho, meta, para) (I,R)
<br /> 542 . * Nitrobenzol, Nitrobenzene (X)
<br /> 543 . * 4-Nitrobiphenyl, 4-NBP (X)
<br /> 544 . Nitro carbo nitrate (I,R)
<br /> 545 . Nitrocellulose, Cellulose nitrate, Guncotton, Pyroxylin,
<br /> Collodion, Pyroxylin (nitrocellulose) in ether and
<br /> alcohol
<br /> (I,R)
<br /> 546 . Nitrochlorobenzene, Chloronitrobenzene (ortho,meta,para)
<br /> (X)
<br /> 547 . Nitrogen mustard (X, C)
<br /> 548 . Nitrogen tetroxide, Nitrogen dioxide (X, I)
<br /> 549 . Nitroglycerin, Trinitroglycerin (X, I,R)
<br /> 550 . Nitrohydrochloric acid, Aqua regia (X, C, I)
<br /> 551 . * Nitrophenol (ortho, meta, para) (X)
<br />
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