Dimethylarsenic acid cacodylic

Hydroxydimethylarsine Oxide (dimethylarsenic acid, cacodylic acid) Surfactants... 

Inorganic arsenicals such as arsenic trioxide, sodium arsenite, lead arsenate, calcium arsenate and Paris Green have been used for many years as soil sterilants. Organic arsenical herbicides, in which the organic group is bonded directly to the arsenic atom, have been used extensively for post-emergence control of weeds in cotton. Several of the more important herbicides are sodium cacodylate (monosodium dimethylarsenic acid) and sodium salts of methane arsonic acid. The latter compounds exist in two principal forms the monosodium salt (MSMA) at pH6.4 and the disodium salt (DSMA) at pH10.2. 

In September 1966 The New York Times published a report that cacodylic acid, an organic arsenic containing compound, was also being used in Vietnam.49 Cacodylic acid was a defoliant that was also toxic to man. According to the Merck Index, cacodylic acid was a dimethylarsenic acid containing 54.29 per cent arsenic, and was extremely poisonous.50 Seventy grams would kill the average 150-lb man if administered subcutaneously. 

Dimethylarsenic chloride, Cacodyl trichloride, CH3)2AsClj,i crystallises in plates or columns from ether, fuming in air. At 40° to 50° C. the trichloride froths and decomposes into methyl chloride and methyldichloroarsine. It is prepared by passing chlorine into a solution of cacodyl chloride in carbon disulplude, or by adding powdered cacodylic acid in small quantities to phosphorus pentachloride mixed with dry ether. 

Cacodylic Acid Hydroxy- Dimethylarsine Oxide Dimethylarsenic Acid Ansar Silvisar 510 ... 

Dimethylarsenic acid Dimethylarsinic acid. See Cacodylic acid... 

Cacodylic Acid — (i) Chemical Designations — Synonyms Hydroxydimethylarsine Oxide Dimethylarsenic Acid Ansar Silvisar 510 Chemical Formula (CHjjjAsCXIH (ii) Observable Characteristics — Physical State (as normally shipped) Solid Color White water solutions may be dyed blue Odor None (iii) Physical and Chemical Properties — Physical State at 15 °Cand I atm. Solid Molecular Weight 138 Boiling Point at 1 atm. > 392, >200, >473 Freezing Point Not pertinent Critical Temperature Not pertinent Critical Pressure Not peninent Specific Gravity >1.1 (est.) At 20°C (solid) Vqpor (Gas) Density Not pertinent Ratio of Specific Heats of Vapor (Gas) Not pertinent Latent Heat of Vaporization Not pertinent Heat of Combustion -6,000, -3,300, -140 Heat of Decomposition Not pertinent (iv) Health Hazards Information — Recommended... 

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