NAME: Silica, Amorphous, Precipitated and Gel
SYNONYM(s):
Diatomite; Silicon dioxide (amorphous); Diatomaceous earth;
Diatomaceous silica; Silica (amorphous) prior to 9/1/89
IMIS: 9050
CAS: 7699-41-4
NIOSH: RTECS VV7310000; 77717
DOT: 1346 32
DESCRIPTION:
Colorless to gray, odorless powder.
MW:
60
VP:
approx. 0 mm
MP:
3100 F
Exposure Limits
OSHA GENERAL INDUSTRY STANDARDS:
see 1910.1000 (Table Z-3)
RECOMMENDED EXPOSURE LIMIT: 6 mg/m3 TWA
Health Factors
IARC:
Silica - Group 3, not classifiable as to its carcinogenicity to humans
(Amorphous Silica)
SYMPTOM(s):
Pneumoconiosis
HEALTH EFFECTS:
Explosive, Flammable (No adverse effects when Good Housekeeping
. Practices are used) (HE18)
Possible Pneumoconiosis (HE10)
ORGAN:
Respiratory system
Monitoring
SLC1:
See Particulates not otherwise regulated (Total Dust)
NOTE:
Amorphous Silica does not diffract x-rays; evaluate gravimetically. Submit respirable sample to SLTC for quartz analysis. See Silica, Crystalline Quartz (as Quartz), Respirable Dust.
WIPE:
No
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