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20840

Sodium cacodylate trihydrate

≥98.0% (T), solid, purum. p.a.

Synonym(s):

Cacodylic acid sodium salt trihydrate, Dimethylarsinic acid sodium salt, Dimethylarsonic acid sodium salt

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About This Item

Linear Formula:
(CH3)2AsO2Na · 3H2O
CAS Number:
6131-99-3
Molecular Weight:
214.03
NACRES:
NA.21
PubChem Substance ID:
57647877
UNSPSC Code:
12352100
EC Number:
204-708-2
MDL number:
MFCD00149079
Beilstein/REAXYS Number:
3702348
Assay:
≥98.0% (T)
Form:
solid

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Product Name

Sodium cacodylate trihydrate, purum p.a., ≥98.0% (T)

InChI key

RLGWPHBPRCROJO-UHFFFAOYSA-M

InChI

1S/C2H7AsO2.Na.3H2O/c1-3(2,4)5;;;;/h1-2H3,(H,4,5);;3*1H2/q;+1;;;/p-1

SMILES string

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

grade

purum p.a.

assay

≥98.0% (T)

form

solid

anion traces

chloride (Cl-): ≤100 mg/kg
sulfate (SO42-): ≤200 mg/kg

cation traces

Ca: ≤100 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤500 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

Quality Level

200

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Show Differences

1 of 4

This Item
C0250C494571995
Sodium cacodylate trihydrate purum p.a., ≥98.0% (T)

Sigma-Aldrich

20840

Sodium cacodylate trihydrate

Sodium cacodylate trihydrate ≥98%

Sigma-Aldrich

C0250

Sodium cacodylate trihydrate

Sodium cacodylate trihydrate BioXtra, ≥98%

Sigma-Aldrich

C4945

Sodium cacodylate trihydrate

Sodium tartrate dibasic dihydrate purum p.a., ≥98.0% (NT)

Sigma-Aldrich

71995

Sodium tartrate dibasic dihydrate

form

solid

form

powder

form

powder

form

solid

assay

≥98.0% (T)

assay

≥98%

assay

≥98%

assay

≥98.0% (NT)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

grade

purum p.a.

grade

-

grade

-

grade

purum p.a.

anion traces

chloride (Cl-): ≤100 mg/kg, sulfate (SO42-): ≤200 mg/kg

anion traces

-

anion traces

chloride (Cl-): ≤0.05%, sulfate (SO42-): ≤0.05%

anion traces

chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg

cation traces

Cd: ≤50 mg/kg, Cu: ≤50 mg/kg, K: ≤500 mg/kg, Pb: ≤50 mg/kg

cation traces

-

cation traces

Al: ≤0.0005%, Ca: ≤0.001%, Cu: ≤0.0005%, Fe: ≤0.0005%, K: ≤0.05%, Mg: ≤0.0005%, NH4+: ≤0.05%, Pb: ≤0.001%, Zn: ≤0.0005%

cation traces

Ca: ≤100 mg/kg, Cd: ≤50 mg/kg, Co: ≤50 mg/kg, Cu: ≤50 mg/kg, Fe: ≤50 mg/kg, K: ≤200 mg/kg, Ni: ≤50 mg/kg, Pb: ≤50 mg/kg, Zn: ≤50 mg/kg

Application

Sodium cacodylate trihydrate may be employed as buffer to maintain pH 7.4 in electron microscopic studies.[1][2] It may be used to compose cacodylate buffer for use in electron microscopic studies.[3]

General description

Sodium cacodylate trihydrate is a biological buffer. Its crystals have been analyzed by single-crystal X-ray diffraction studies. Studies suggested its crystals exhibited two phases, viz. penta-μ-aqua-disodium(I) bis(dimethylarsenate), {[Na2(H2O)5](C2H6AsO2)2}n and di-μ-aqua-bis[triaquasodium(I)] bis(dimethylarsenate), [Na2(H2O)8](C2H6AsO2)2.[4]

signalword

Danger

Hazard Classifications

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

Storage Class

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3

ppe

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges

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Certificates of Analysis (COA)

Lot/Batch Number
BCCP1491
BCCL8962
BCCH1167
BCCD4275
BCBZ4430

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Anders Lennartson et al.
Acta crystallographica. Section C, Crystal structure communications, 64(Pt 1), m13-m16 (2008-01-25)
Crystals from commercial samples of sodium cacodylate trihydrate, NaO2As(CH3)2 x 3 H2O, were analyzed by single-crystal X-ray diffraction and two phases were identified, viz. penta-mu-aqua-disodium(I) bis(dimethylarsenate), {[Na2(H2O)5](C2H6AsO2)2}n, (I), and di-mu-aqua-bis[triaquasodium(I)] bis(dimethylarsenate), [Na2(H2O)8](C2H6AsO2)2, (II). Both (I) and (II) form layered structures
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