|Monthly Tech-Tip |
Health concerns about talc revolve mainly around the non-platiform content, the extent to which these are asbestos, and how high the length:width ratio of non-asbestos particles needs to be to make them a hazard also.
ACGIH TLV and OSHA PEL: 2 mg/cubic meter, 8 hr. TWA, Respirable Dust (talc containing no asbestos fibers).
Chlorite (typical 3%) ACGIH TLV: 10 mg/cubic meter 8 hr. TWA
CAS: 14808-60-7 Silica: (typical 2%) ACGIH TLV & OSHA PEL: 0.1 mg/cubic meter 8 hr. TWA, Respirable Dust
Wilson's RISK Scale of Material Hazards
(1-4 higher numbers are increased hazard)
May cause irritation to upper respiratory tract.
Pre-existing lung disease may be aggravated by exposure to dust. Prolonged over exposure can cause Talcosis (a pulmonary fibrosis of the lungs). Although talc is a fibrous magnesium silicate as is asbestos, it does not have the same effect on the lungs. The two minerals are closely associated, and most commercial talcs do contain some asbestos.
Talc is not characterized as a carcinogen by NTP, IARC, ACGIH or OSHA.
Talc may contain extremely small amounts (less than 2 ppm) of substances regulated under drinking water regulations: e.g. arsenic, beryllium, cadmium, chromium, lead, mercury, nickel.
|Materials||4392 Rosa Blanca|
|Materials||Glacier 200 Talc|
|Materials||Luzenac Talc 00S|
|Materials||Cimcoat 325 Talc|
|Materials||Ceramitalc No. 1|
|Materials||Pioneer 2661 Talc|
Replace Talc with Nepheline Syenite in low temperature white bodies
This is a development project at Plainsman Clays. It is in response to Texas talc no longer being available in North America.
Asbestos at ilo.org
Asbestos at Wikipedia
J&J has allocated $4 billion for talc litigation in 2019
Judgements against them claim their baby powder caused cancer and mesothelioma. Once settlement alone was $2 billion!
Asbestos: A Difficult-to-Repace Material