Arsenobetaine

Arsenobetaine

Names
Preferred IUPAC name 2-Trimethylarsoniumylacetate
Systematic IUPAC name 2-(Trimethylarsaniumyl)acetate
Identifiers
CAS Number	64436-13-1 N
3D model (Jmol)	Interactive image Interactive image
Beilstein Reference	3933180
ChemSpider	43109 N
ECHA InfoCard	100.162.654
KEGG	C19331 N
MeSH	Arsenobetaine
PubChem CID	47364
RTECS number	CH9750000
InChI InChI=1S/C5H11AsO2/c1-6(2,3)4-5(7)8/h4H2,1-3H3 N Key: SPTHHTGLGVZZRH-UHFFFAOYSA-N N InChI=1/C5H11AsO2/c1-6(2,3)4-5(7)8/h4H2,1-3H3 Key: SPTHHTGLGVZZRH-UHFFFAOYAQ
SMILES C[As+](C)(C)CC(=O)[O-] C[As+](C)(C)CC([O-])=O
Properties
Chemical formula	C5H11AsO2
Molar mass	177.997501013 g mol−1
Hazards
EU classification (DSD) (outdated)	Toxic (T); Dangerous for the environment (N)
R-phrases (outdated)	R23/25 R50/53
S-phrases (outdated)	S20/21 S28 S45 S60 S61
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Arsenobetaine is an organoarsenic compound that is the main source of arsenic found in fish. It is the arsenic analog of trimethylglycine, commonly known as betaine. The biochemistry and its biosynthesis are similar to those of choline and betaine.

Arsenobetaine is a common substance in marine biological systems and unlike many other organoarsenic compounds, such as dimethylarsine and trimethylarsine, it is relatively non-toxic.

It has been known since 1920 that marine fish contain organoarsenic compounds, but it was not until 1977 that the chemical structure of the most predominant compound arsenobetaine was determined.