Cobalt metal dust

Coal tar pitch volatiles, see Particulate polycyclic aromatic hydrocarbons (PPAH), as benzene solubles Cobalt metal, dust and fume (as Co)... 

Aquacat C.l. 77320 CCRIS 1575 Cobalt Cobalt-59 Cobalt, elemental Cobalt fume Cobalt metal, dust and fume Cobalt metal powder EINECS 231-158-0 HSDB 519 Kobalt NCI-C60311 Super cobalt. Oxidizing agent, lamp filaments, in manufacture of cobalt steel in porcelain, glass, pottery, enamels. Atomergic Chemetals Cerac Noah Chem. Sigma-Aldrich Fine Chem. 

EXPOSURE GUIDELINES ACGIH TLV TWA (cobalt metal, dust and fume) 0.02 mg/m OSHA PEL TWA (cobalt metal, dust and fume) O.lmg/m NIOSH REL TWA (cobalt metal, dust and fume) 0.05mg/m IDLH (cobalt metal, dust and fume) 20mg/m . 

SYNONYMS aquacat, cobalt metal dust, cobalt metal fume, super cobalt. 

Synonyms/Trade Names Cobalt metal dust, Cobalt metal fume... 

Exposure to cobalt (metal fumes and dust) should be limited to 0.05 mg/ms (8-hour time-weighted average 40-hour week). 

The ACGIH adopted TLV/TWA for 1992—1993 for fluorides as F is TWA 2.5 mg/m, and for cobalt as Co metal dust TWA 0.05 mg/m. Dust masks should be used while handling both the cobalt fluorides and all other cobalt compounds. CoF is shipped as an oxidizer and a corrosive material. 

The dust and powder of cobalt metal, ores, and some compounds, such as cobaltous nitrate [ColNOfljT bH O], are flammable and toxic if inhaled. Cobaltous acetate [ColCjHjOjlj dHjO], which is soluble in water, is not allowed to be used in food products because of its toxicity. 

Toxicology. Cobalt causes skin irritation, allergic contact dermatitis, and occupational asthma interstitial pulmonary fibrosis is associated with exposure to hard metal dust (tungsten and cobalt). 

S203 Cobalt metal fume dust 0.1 MCEF Aqua regia AA 0. 031-0.22 (f)... 

SHIRAKAWA, T KUSAKA, Y FUKIMURA, N GOTO, S. MORIMOTO, K. (1989) Occupational asthma from cobalt sensitivity in workers exposed to hard metal dust. Chest, 95, 29-37. 

SYNONYMS Cobalt oxide, cobalt chloride, aquacat, cobalt metal, fume and dust, cobalt carbonyl, cobalt hydrocarbonyl, synonyms vary by compound. 

Cobalt is a brittle, hard metal, resembling iron and nickel in appearance. It has a metallic permeability of about two-thirds that of iron. The transformation is slnggish and accounts in part for the wide variation in reported data on physical properties of cobalt. Exposure to cobalt (metal fumes and dust) should be limited to 0.05 mg/m (8-hour time-weighted average in a 40-hour week). 

Toxicology Exposure is by inhalation. Cobalt causes skin allergies and irritation, and its dust causes occupational asthma. The lARC decided that cobalt metal powder and cobaltous oxide are A3 confirmed carcinogenics in animals, and they are possible human carcinogens [20]. 

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