Sodium methylarsonate

Name: Sodium methylarsonate
Brand: Jinan Shenghe Chemical Co., Ltd.
SKU: 28668

CAS 2163-80-6CH4AsNaO3MW 161.952

Sodium methylarsonate (CAS 2163-80-6) — formula CH4AsNaO3, molecular weight 161.952; category inorganic chemicals.

Specifications

CAS Number2163-80-6

Molecular FormulaCH4AsNaO3

Molecular Weight161.952

Melting Point235 to 241 °F (NTP, 1992)

LogPlog Kow= -3.10

CategoryInorganic Chemicals

Purchase Profile

What this product is

Sodium methylarsonate is an inorganic compound with CAS registry number 2163-80-6 and molecular formula CH4AsNaO3 (molecular weight 161.952), belonging to the inorganic chemicals segment of chemical raw materials.

Identification

CAS number: 2163-80-6

Its molecular formula CH4AsNaO3 comprises 1 C, 4 H, 1 As, 1 Na, 3 O atoms.

Also known as: Sodium methylarsonate · MSMA

Category: inorganic chemicals

Frequently Asked Questions

What is the CAS number of Sodium methylarsonate?

The CAS registry number of Sodium methylarsonate is 2163-80-6.

What is the molecular formula and molecular weight of Sodium methylarsonate?

Molecular formula CH4AsNaO3, molecular weight 161.952.

What other names is Sodium methylarsonate known by?

It is also registered under: Sodium methylarsonate, MSMA.

Which category does Sodium methylarsonate belong to?

Category: Inorganic Chemicals.

PubChem Public Data

Public-database records for Sodium methylarsonate (CAS 2163-80-6), reproduced here for independent cross-checking.

Safety classification and hazard statements

Reported hazard statements	H301 (90.7%), H331 (90.7%), H400 (90.7%), H410 (90.7%)

H301 (90.7%): Toxic if swallowed [Danger Acute toxicity, oral]

H331 (90.7%): Toxic if inhaled [Danger Acute toxicity, inhalation]

Physical description and handling notes

Methanearsonic acid, [sodium salt] appears as odorless colorless solid. Solution may be red or green. Solid may float or sink in water; solid and solution mix with water. (USCG, 1999)
White solid; [Hawley] Colorless odorless solid; [CAMEO]
White solid
None
Decomposes (NTP, 1992)
Mp: 113-116 °C /Sodium methanearsonate sesquihydrate/

Reported physical properties

熔点	235 to 241 °F (NTP, 1992)
熔点	130-140 °C
溶解度	In water, 5.8X10+5 mg/l @ 20 °C.
蒸气压	0.00000008 [mmHg]
蒸气压	1X10-5 Pa @ 25 °C (7.8X10-8 mm Hg)
LogP	log Kow= -3.10
Dissociation Constants	pKa1= 4.1; pKa2 = 9.02

How this substance is indexed

CAS Registry Number	2163-80-6
PubChem CID	23664719
分子式	CH4AsNaO3
IUPAC 名称	sodium hydroxy(methyl)arsinate
UNII（FDA）	600QCW45IV

Documented uses

Used as post-emergence herbicide for turf, cotton, and non-cropland; [HSDB]
Post-emergence herbicide for grassy weeds.
Information on 5 consumer products that contain Monosodium acid methanearsonate in the following categories is provided:
MSMA is produced by the reaction of diarsenic trioxide with methyl chloride and aq sodium hydroxide or by the methylation of sodium arsenite by dimethyl sulfate
MSMA ... formed from DSMA at pH 6-7.
Methyl chloride + arsenic trioxide + sulfuric acid + sodium hydroxide (reaction/neutralization)

Names this substance appears under

2163-80-6; Monosodium methanearsonate; Daconate; SODIUM METHANEARSONATE; Gepiron; Mesamate; Monoban; Drexar; Monate; Phyban; Bueno; Super Arsonate; Sodium hydrogen methylarsonate; Ansar 6.6; Herb-All; Herban M

Computed molecular descriptors

分子量	161.952
氢键供体数	1
氢键受体数	3
可旋转键数	0
精确质量	161.927408
单同位素质量	161.927408
拓扑极性表面积	60.4
重原子数	6
形式电荷	0
复杂度	71.2

Database abstract

Sodium methylarsonate · CAS 2163-80-6 · CH4AsNaO3. UNII 600QCW45IV. 熔点: 235 to 241 °F (NTP, 1992); 熔点: 130-140 °C; 溶解度: In water, 5.8X10+5 mg/l @ 20 °C..

Source: PubChem / Wikidata; the batch COA governs where values differ.

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