Pentoxide

Material Information

National Standard No .: 61010;

Chinese Synonym: Availability; Pentoxide; Arsenic Anhydride; Hydroid; Arsenic Anhydride;

English name: ARSENIC pENTOXIDE;

synonyms: anhydridearsenique; anhydridearsenique (french); arsenicacid, anhydride; Arsenicacidanhydride; arsenicoxide (as2o5); Arsenicpentaoxide; arsenicpentoxide100 /; arsenicpentoxide100 / 105000;

mol file: 1303-28-2.mol;

Einecs: 215-116-9;

molecular formula < B>:as ₂ o ₅ ;

CAS number: 1303-28-2.

Physical properties

appearance and traits: white amorphous solid, easy to solve

molecular weight : 229.84

Vapor pressure:

melting point : 315 ° C (Decomposition)

Solubility: Soluble In water, dissolved in ethanol, acid, alkali

density : relative density (water = 1) 4.32

stability : Stable

Dangerous marking: 13 (inorganic drama drug)

Main use: Preparation for arsenate , Dyes and printing industries, etc., and can be used as insecticides.

Chemical properties

1, if the specifications are used and stored, it will not decompose, without known hazardous reactions, avoid acid, alkali, halogen, halogen compounds. There is aqueous solicity, decomposes oxygen and trioxide in 315 ° C. The arsenic arsenic is weakly acidic, dissolved in water (arsenic acid is a ternary weak acid), but is dissolved in water velocity, and the alkali reaction can generate arsenate. When this solution was heated to 130 ° C evaporating cooling, it became a honey-like viscous liquid. Place it in a sulfuric acid dryer, get a beautiful and transparent H _{3 ASO 4 ·}

2, stability: stability.

3, forbidden qualifiers: acid, halogen, water and water vapor.

4 to avoid contact conditions: wet air.

5, polymerization hazard: no aggregation.

6, decomposition product: trioxide, arsenic, oxygen.

Hazard

Health Hazard

invasive pathway: inhalation, merge, transdermal absorption.

Health Hazard: Arsenic and its compound have special affinity to the sulfhydryl group of the in vivo protein. Acute poisoning: oral causing acute gastroenteritis, shock, peripheral neuropathy, anemia and poisonous liver disease, myocarditis, etc. Can die due to paralysis due to breathing. A large amount of suction can cause cough, chest pain, dizziness, etc. The symptoms of digestive tract are lighter and other symptoms are oral. Heavy people can die.

Chronic effect: Long-term contact with higher concentration dust causes chronic poisoning, mainly neurovable syndrome, multiple neuropathy, liver damage, rhinitis, nasal septum perforation, bronchitis, etc.

toxic information and environmental behavior

toxicity: high toxicity.

Acute toxicity: ld508 mg / kg (rat oral); 55 mg / kg (mouse oral).

Transition: DNA Repair: Bacillus 50mmol / L. Cell genetics analysis: human cells 1200 nmol / L.

Reproductive toxicity: minimum poisonous dose (TDL0) under mouse skin (TDL0): 4597 μg / kg (30 days, male), has an impact on testicles and vasodes.

Carcinogenicity: IARC carcinogenic comments: people are positive; animals are unclear.

Hazardous characteristics: In case of high heat, the open flame will produce a highly toxic vapor.

Burning (decomposition) product: arsenic, oxygen.

Monitoring method

Diethyl dithiocarbamic acid silver color color method "Determination method of harmful substance in air" (second edition), Hang Shiping, editor-in-chief

Hydride atomic absorption method "Method for determination of harmful substances in air" (second edition), Hang Shiping editor

Environmental standard: China (TJ36-79) Workshop air The maximum allowable concentration of harmful substances 0.3mg / m ³

emergency treatment

leak emergency treatment

Isolated leak pollution zone, limited Go out. It is recommended that the emergency treatment personnel wear a self-propelled respirator to wear antiseptures. Do not touch the leak directly.

Small amount leak: Avoid dust, collected in a clean, clean, covered container. It can also be rinsed with a lot of water, and then the water is diluted into the wastewater system.

A large number of leaks: covered with plastic cloth, canvas, reduce scattering. Then collect, recycle or transport it to the waste disposal site.

Protective measures

Respiratory protection: When you can contact its dust, you should wear the head cover electric air filter dust-proof respirator. Wear the air breathing apparatus if necessary. Eye protection: protective in respiratory protection.

Body protection: wearing a coat rubber cloth.

Hand protection: wearing rubber gloves.

Other: Smoking, eating and drinking water is prohibited at work. After work, take a shower and change clothes.

First aid measures

Skin contact: Take off the contaminated clothes, and thoroughly rinse the skin with soap water and clear water. Medical doctor.

Eye contact: lift eyelids, flush with flow clear water or physiological saline. Medical doctor.

Inhalation: Quickly leave the site to the fresh air. Keep the respiratory tract smooth. If breathing is difficult, give oxygen. If the breathing is stopped, artificial breathing immediately. Medical doctor.

Entering: Inspire. Wash the stomach. Give milk or egg white. Medical doctor.

Fire extinguishing method: Firefighters must wear full body fire and anti-drug clothing, fire extinguishing in the upper wind. Extinguishing agent: dry powder, water, sand.