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Merck

S9663

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
NACRES:
NB.24
PubChem Substance ID:
UNSPSC Code:
12352302
MDL number:
Assay:
≥98%, 98.0-102.0%
Grade:
ACS reagent
Form:
powder
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grade

ACS reagent

Quality Segment

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

Application

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


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Danger

Hazard Classifications

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

Storage Class

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



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