| Agent Name |
Gallium arsenide |
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| CAS Number |
1303-00-0 |
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| Formula |
As-Ga |
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| Major Category |
Metals |
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| Synonyms |
Gallium monoarsenide; [HSDB] |
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| Category |
Metals, Inorganic Compounds |
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| Description |
Gray crystals or powder; [CAMEO] |
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| Sources/Uses |
Used in semiconductor applications; [Merck Index #4347] |
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| Comments |
See arsenic; Its toxicity is due to arsenic, and exposed workers can be monitored by urine arsenic levels. [Harrison RJ, State of the Art Reviews: Occupational Medicine, Vol. 1, No. 1, pages 49-58.] Inhalation studies in experimental rats show that both gallium and arsenic are cleared within 14 days after treatment. [Webb DR et al. Pulmonary Clearance and Toxicity of Respirable Gallium Arsenide Particulates. Am Ind Hyg Assoc J. 1987 Jul;48(7):660-7.] Gallium arsenide is "poorly absorbed"; it is excreted primarily in the feces. [Rosenstock, p. 947] Toxic arsenic released when heated to decomposition; [CAMEO] "Metalloid arsenic is generally regarded as nonpoisonous due to its insolubility in water and body fluids." [ATSDR Case Studies: Arsenic Toxicity] Gallium arsenide is classified as a human carcinogen. [IARC] |
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| Reference Link |
Assessment of arsenic exposures and controls in gallium arsenide production |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
No |
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| Bioaccumulates |
Yes |
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| TLV (ACGIH) |
0.0003 mg/m3, respirable fraction |
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| Explanatory Notes |
NIOSH REL = 15 min ceiling of 0.002 mg/m3; Melting point = 1238 deg C; [Merck Index] |
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| Adverse Effects |
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| Neurotoxin |
Sensorimotor Neuropathy |
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| IARC Carcinogen |
Known Carcinogen |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: GALLIUM ARSENIDE
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