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Key Documents

S9663

Sigma-Aldrich

Sodium arsenate dibasic heptahydrate

ACS reagent, ≥98%

Synonym(s):

Disodium hydrogen arsenate heptahydrate, di-Sodium hydrogen arsenate heptahydrate

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About This Item

Linear Formula:
Na2HAsO4 · 7H2O
CAS Number:
Molecular Weight:
312.01
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NB.24

grade

ACS reagent

Quality Level

Assay

≥98%
98.0-102.0%

form

powder

impurities

≤0.005% Insoluble matter

pH

8.5-9 (25 °C, 50 g/L)

anion traces

arsenite (As2O3): ≤0.01%
chloride (Cl-): ≤0.001%
nitrate (NO3-): ≤0.005%
sulfate (SO42-): ≤0.01%

cation traces

Fe: ≤0.001%
heavy metals (as Pb): ≤0.002%

SMILES string

O.O.O.O.O.O.O.[Na+].[Na+].O[As]([O-])([O-])=O

InChI

1S/AsH3O4.2Na.7H2O/c2-1(3,4)5;;;;;;;;;/h(H3,2,3,4,5);;;7*1H2/q;2*+1;;;;;;;/p-2

InChI key

KOLXPEJIBITWIQ-UHFFFAOYSA-L

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Application

Sodium arsenate dibasic heptahydrate can be used as an internal standard for the quantification of arsenic species using various spectroscopic methods.

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Shugo Suzuki et al.
Toxicology, 299(2-3), 155-159 (2012-06-06)
Inorganic arsenic is a known human carcinogen, inducing tumors of the skin, urinary bladder and lung. It is metabolized to organic methylated arsenicals. 2,3-Dimercaptopropane-1-sulfonic acid (DMPS), a chelating agent, is capable of reducing pentavalent arsenicals to the trivalent state and
M Sri Lakshmi Sunita et al.
Ecotoxicology (London, England), 21(1), 202-212 (2011-09-01)
In the present study, 44 arsenic-resistant bacteria were isolated through serial dilutions on agar plate with concentrations ≥0.05 mM of sodium arsenite and ≥10 mM of sodium arsenate from Mandovi and Zuari--estuarine water systems. The ars genotype characterization in 36
Tatyana S Pinyayev et al.
Chemical research in toxicology, 24(4), 475-477 (2011-03-11)
The conventional scheme for arsenic methylation accounts for methylated oxyarsenical production but not for thioarsenical formation. Here, we report that in vitro anaerobic microbiota of mouse cecum converts arsenate into oxy- and thio- arsenicals. Besides methylarsonic acid (MMA(V)), arsenate was
Takayuki Watanabe et al.
Archives of toxicology, 85(6), 577-588 (2011-05-04)
It has been suggested that arsenic (+3 oxidation state) methyltransferase (AS3MT) plays a critical role in methylation of arsenic, and that arsenic-glutathione conjugate is a substrate for AS3MT-catalyzed methylation of arsenic. However, the mechanism of arsenic methylation in cells is
William Brattin et al.
Journal of toxicology and environmental health. Part A, 76(7), 449-457 (2013-04-25)
This study describes a method for measuring the relative oral bioavailability (RBA) of arsenic (As) in soil and other soil-like media using young swine as the animal model. Groups of animals are exposed to site soil or sodium arsenate orally

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