NAME: Graphite, natural respirable dust
SYNONYM(s):
Plumbago, Potelot; Corbo minerals; Black lead; Carburet of iron;
Silver lead; Crayon noir
IMIS: 9090
CAS: 7782-42-5
NIOSH: RTECS VV7780000
DESCRIPTION:
A soft greasy-feeling solid platy mineral useful as a lubricant.
MW:
12
BP:
N/A
VP:
approx 0 mm
MP:
6040 F
INCOM:
Very strong oxidizers, such as fluorine, chlorine trifluoride,
potassium peroxide
Exposure Limits
OSHA GENERAL INDUSTRY PEL:
15 mppcf (Z-3)
ACGIH TLV:
2 mg/m3 TWA (Respirable fraction)
NIOSH REL: 2.5 mg/m3 TWA
Health Factors
SYMPTOM(s):
Coughing, dyspnea, black sputum, pulmonary function impaired; fibrosis
HEALTH EFFECTS:
Cumulative lung damage (Pneumoconiosis) (HE10)
ORGAN:
Respiratory system, CVS
Monitoring
PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):
MEDIA:
Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns preceded by 10 mm Nylon Cyclone
MAX V:
960 Liters MAX F:
2.0 L/min
ANL 1:
Gravimetric analysis followed by X-ray diffraction
REF:
11, 2 (OSHA ID-142)
SAE:
0.02
CLASS:
Fully Validated
NOTE:
Field method for determining compliance with Graphite standard. Following this analysis, submit sample to SLTC for analysis of free Silica content (OSHA method ID-142). If the free silica exceeds 1%, apply the Free Silica standard. If the free silica is <1%, apply the Natural Graphite standard. If filter is not overloaded, samples may be collected up to an 8-hour period. Submit bulk sample in separate package when request for silica analysis is made.
|
Back to Top
