GB No. 61906
CAS No. 1332-21-4
Molecular Formula 2SiO2.3MgO.2H2O (main component)
molecular weight 370 (main component)

white, gray, green or brown fibrous; vapor pressure; the temperature> 10 ° C; solubility : not soluble in water; density : relative density (water = 1) 2.5; Stability : stability; risk Marker 14 (drugs ); the main purposes : as an insulation material, the binding, stoves and hot steam pipe coating objects, the filter medium, gloves and fire-resistant clothing

2. The impact on the environment :
a health hazard

pathways : inhalation.
health hazards : long-term exposure to asbestos can cause lung asbestos, patients with cough, chest pain, breathing difficulties, severe respiratory failure and special ring.

two, toxicology information and environmental behavior

to aquatic life toxicity : asbestos on aquatic biological studies are limited, according to a limited study (mainly confined to the laboratory) showed that asbestos fibers may be algae, mollusks and fish intake, absorption, which may result in fish organs morphological change. The relatively high concentration of asbestos (108 fiber / 1) role, the fish by the gills, kidney never intake and enrichment of asbestos fibers (Laut & Schurr, 1984; Woodhead, 1983; EPA, 1980). In a separate study points out that the concentration of asbestos in 102 ~ 104 fiber / 1 under the conditions of the Asian clam inhibited the growth and reproduction (BelAir, 1986) These few insufficient information on the asbestos on the ecological system of conclusion.

Cancer Research admission (IARC) has been recognized as a carcinogen. The asbestos on the human body, the major hazards of the carcinogenic effect. The oral intake of high concentrations of asbestos fibers in animal tests, the results are basically negative. The right to drinking water through contact with asbestos crowd epidemic survey found that the health impact is negative. In some other studies that will increase the possibility of gastrointestinal tumor.

asbestos fibers extremely resistant chemical degradation, and therefore its in the soil can be retained quite a long time, asbestos fibers in the water can not afford chemical reaction, it can exist in the water a long time, and can spread great distances.

hazardous characteristics : no special combustion characteristics of the explosion.

3. Emergency Monitoring Methods :
asbestos rapid screening tests - (Kim, Walter S.; Carter, James W., I; Dupel, Richard E.), "Am.Ind.Hyg. Assoc. J. "1981,42, No3, 198 ~ 201 (English)" Analysis of Chemical Abstracts "1983.9

4. Laboratory monitoring methods :

microscopy (HJ/T41-1999, stationary source emission) (asbestos)

5. Environmental standards :
China (TJ36-79) Workshop harmful substances in the air that the maximum allowable concentration drills
the former Soviet Union (1977) neighborhood of the maximum allowable concentration 0.15mg/m3 (days average); 0.5mg/m3 (a value)

6. Emergency treatment and disposal methods :
a leakage contingency

isolation leakage polluted area, located around the warning signs, the proposed emergency personnel wearing gas masks, wear appropriate dress. To avoid dust, carefully sweeping, recycling.

two protective measures

respiratory protection : should wear dust masks.
eye protection : to use safety masks.
protective clothing : wearing overalls.
hand protection : general need special protection.
Other : personal hygiene.

three, and emergency measures

contact with the skin : mobile water rinse.
INHALED : from the scene.

fire fighting methods : Unburning.