Respirable cristobalite

NFPA Ratings

Scale 0-4) Health = 1 Fire = 0 Reactivity = 0

Health hazards

Cancer hazard (in humans)

Physical hazards

There are no physical hazards associated with this material

Potential health effects

Acute and Chronic) Inhalation: Inhalation of finely divided crystalline silica dust particles may cause physical discomfort of the respiratory tract. Repeated or prolonged inhalation of dust particles may result in silicosis in a few weeks to six months depending on the level of exposure. Symptoms may include coughing, shortness of breath, and weight loss. Persons diagnosed with silicosis have an increased risk of developing lung cancer. Skin Contact: Exposure may cause irritation of intact skin due to mechanical abrasion. If the skin is abraded, a heavy growth of scar tissue may be induced. Eye Contact: Exposure may cause irritation due to mechanical action. Ingestion: Effects caused by ingestion are due to mechanical action as crystalline silicas are biologically inert. Listed as a Carcinogen/Potential Carcinogen Yes No In the National Toxicology Program (NTP) Report on Carcinogens X(a) In the International Agency Report on Carcinogens (IARC) Monographs X(b) By the Occupational Safety and Health Administration (OSHA) X (a) NTP lists cristobalite as known to be a human carcinogen. (b) IARC lists cristobalite as Group 1 (carcinogenic to humans). 3. COMPOSITION AND INFORMATION ON HAZARDOUS INGREDIENTS Component(a) CAS Registry EC Number Nominal Mass Concentration (EINECS) (%) Cristobalite 14464-46-1 238-455-4 100 (a) Each loaded PVC filter contains 500 µg of cristobalite particulate matter. Hazardous components 1 % or greater; carcinogens 0.1 % or greater are listed in compliance with OSHA 29 CFR 1910.1200. EC Classification: Not classified. EC Risk (R No) and EC Safety (S No): Not assigned.