Methane arsonic acid

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. 

Disodium Methyl Arsonate CAS 144-21-8 Agent Index A113 Lead Arsenate CAS 102-48-4 Agent Index A114 Methane Arsonic Acid CAS 124-58-3 Agent Index A115 Monoammonium Methane Arsonate ... 

Figure 1 Oxidation states of volatile and soluble arsenic transformed by biological systems. pKi represents the equilibrium between the protonated cation and neutral forms of the hydroxyl group of dimethylarsinic acid. pKj represents the equilibrium between the neutral form and anionic form (2). Occasionally referred to as arsenous acid (2). HO—As=0 has also been referred to as arsenious acid (52). The term arsenite often refers to any of the As(lll) oxides. The species will be a function of the solute and the pH. Given that the pKa of arsenious acid is 9.2 (52), the protonated form is most likely the predominant form in aqueous environmental and physiological samples below pH 9. Structure commonly used when discussing arsenite in biological transformations, but is most likely not the predominant form in aqueous solutions. Monosodium methane arsonic acid (MSMA) is the commercially available sodium salt.

SYNS CALAR CALCIUM ACID METHANE-ARSONATE CALCIUM HYDROGEN METHANE-ARSONATE CALCIUM METHANEARSONATE CAMA SUPER CRAB-E-RAD-CALAR SUPER DAI E-RAD SUPER DAL-E-RAD-CALAR USAF AN-11... 

MONOSODIOGLUDAMAIATO (ITALIAN) see MRL500 MONOSODIUM ACID METHANE,ARSONATE see MRL750... 

Stringer and Attrep compared hydrogen peroxide-sulphuric acid digestion and U.V. photodecomposition methods for the decomposition in water samples of triphenylarsine oxide, disodium methane-arsonate and DMAA to inorganic arsenic prior to reduction to arsine and determination by atomic absorption spectroscopy or by the AgDDC spec-trophotometric method . 

TABLE 8. Recovery of arsenic from triphenylarsine oxide, disodium methane arsonate and dimethylarsinic acid employing wet digestion with 5 ml of 30% hydrogen peroxide and 5 ml of sulphuric acid with analyses by AgDDC and atomic absorption ... 

Calcium Acid Methane Arsonate A107 Industrial 151... 

Tetrakis(diiodoarsinomethyl)methane (292) <86ZN(B)863> on hydrolysis gives the arsonous acid (293) of the trioxatriarsaadamantane <87J0M(336)323>. The crystal structure of the deuterated derivative (-As(OD)2) was solved by x-ray diffraction analysis. There is evidence for the existence of two... 

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