Particulates nuisance dusts

Pentaerythritol and trimethylolpropane are classified as nuisance particulate and dust, respectively. They are both nontoxic to animals by ingestion or inhalation and are essentially nonirritating to the skin or eyes (2,74). 

Mg(OH)2 powder is classified by OSHA as a nuisance dust. ACGIH categorizes the powder form as particulates not otherwise classified. Exposure limits are as follows (108) ACGIH 10 mg/m , OSHA 5 mg/m (respirable), and 15 mg/m (total). Magnesium hydroxide is reported in the EPA TSCA inventory (109). 

While some particulates, such as silica, produce well-recognized pathological effects, others, such as carbon dust, are more or less inert. However, there is no dust that does not produce some effect on the lungs when inhaled continually for perhaps years. Excessive concentrations of nuisance dusts in the air may cause reduction in visibility as well as uncomfortable deposits in the eyes, ears, and nasal passages, or even can cause... 

Questionable carcinogen. Mutation data reported. See also CARBON. A nuisance dust in high concentrations. While it is true that the tiny particulates of carbon black contain some molecules of carcinogenic materials, the carcinogens are apparently held tightly and are not eluted by hot or cold water, gastric juices, or blood plasma. 

Hazard Slightly toxic by ingestion. A nuisance dust. TLV TWA (nuisance particulate) 10mg/m3of total dust not classifiable as a human carcinogen (when toxic impurities are not present, e.g., quartz <1%)... 

Toxicology LD50 (oral, rat) > 2500 mg/kg ACGIH TLV 10 mg/m total particulates (powd.) negligible skin irritant nonirritating to eyes, particulates may cause mech. irritation nuisance dust by inh. (powd.) low toxicity by ing. TSCA listed Envirorrmental Not considered biodeg. 

Toxicology ACGIH TLV10 mg/m total particulates may be mild skin irritanl/sensilizer molten prod, will cause skin bums particulates may cause mech. irritation to eyes nuisance dust by inh. TSCA listed Environmental Not considered biod. ... 

Regulatory DOT nonregulated SARA 311/313 nonreportable Canada DSL, EU, Australia, Japan, Korea listed Properties Wh. powd. char, waxy odor negligible sol. in water sp.gr. 0.91 vise. 1700-2000 cps (190 C) m.p. 145-152 C acid no. nil sapon. no. nil flash pt. (OC) > 200 C hardness < 0.5 dmm 100% act. Toxicology ACGIH TLV 10 mg/m total particulates molten material causes thermal skin burns particulates may cause mech. irritation to eyes nuisance dust by inh. fumes from molten material may be irritating low toxicity by ing. TSCA listed Environmental Not considered biodeg. 

Toxicology Possible physical irritant from dust particles particulates may scratch eye surfs, and cause mech. irritation possible nuisance dust by inh. maintain below TWA 10 mg/m low oral toxicity low toxicity by skin contact TSCA listed... 

---