CAS #:

Linear Formula:


MDL Number:


EC No.:



(2N) 99% Dimethylarsinic Acid
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(3N) 99.9% Dimethylarsinic Acid
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(4N) 99.99% Dimethylarsinic Acid
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(5N) 99.999% Dimethylarsinic Acid
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Dimethylarsinic Acid Properties (Theoretical)

Compound Formula C2H7AsO2
Molecular Weight 137.997
Appearance White crystals or powder
Melting Point 195-200 °C
Boiling Point > 200 °C
Density N/A
Solubility in H2O N/A
Exact Mass 137.966201
Monoisotopic Mass 137.966201

Dimethylarsinic Acid Health & Safety Information

Signal Word Danger
Hazard Statements H301-H331-H410
Hazard Codes T,N
Risk Codes 23/25-50/53
Safety Statements 20/21-28-45-60-61
RTECS Number CH7525000
Transport Information UN 1572 6.1/PG 2
WGK Germany 3

About Dimethylarsinic Acid

Dimethylarsinic Acid is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Dimethylarsinic Acid Synonyms

Cacodylic acid, Dimethylarsonic acid, Hydroxydimethylarsine oxide, DMAA, arsinic acid, dimethyl-,

Chemical Identifiers

Linear Formula (CH3)2As(O)OH
MDL Number MFCD00002095
EC No. 200-883-4
Beilstein/Reaxys No. 1736965
Pubchem CID 2513
IUPAC Name dimethylarsinic acid
InchI Identifier InChI=1S/C2H7AsO2/c1-3(2,4)5/h1-2H3,(H,4,5)

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements

See more Arsenic products. Arsenic (atomic symbol: As, atomic number: 33) is a Block P, Group 15, Period 4 element with an atomic radius of 74.92160. Arsenic Bohr ModelThe number of electrons in each of arsenic's shells is 2, 8, 18, 5 and its electron configuration is [Ar] 3d10 4s2 4p3. The arsenic atom has a radius of 119 pm and a Van der Waals radius of 185 pm. Arsenic was discovered in the early Bronze Age, circa 2500 BC. It was first isolated by Albertus Magnus in 1250 AD. In its elemental form, arsenic is a metallic grey, brittle, crystalline, semimetallic solid. Elemental ArsenicArsenic is found in numerous minerals including arsenolite (As2O3), arsenopyrite (FeAsS), loellingite (FeAs2), orpiment (As2S3), and realgar (As4S4). Arsenic has numerous applications as a semiconductor and other electronic applications as indium arsenide, silicon arsenide and tin arsenide. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors.


July 14, 2020
Los Angeles, CA
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