20840

Sodium cacodylate trihydrate

purum p.a., ≥98.0% (T)

• Synonym(s): Cacodylic acid sodium salt trihydrate, Dimethylarsinic acid sodium salt, Dimethylarsonic acid sodium salt
• Linear Formula: (CH₃)₂AsO₂Na · 3H₂O
• CAS Number: 6131-99-3
• Molecular Weight: 214.03
• Beilstein: 3702348
• EC Number: 204-708-2
• MDL number: MFCD00149079
• UNSPSC Code: 12352100
• PubChem Substance ID: 57647877
• NACRES: NA.21

Properties

• grade: purum p.a.
• Quality Level: 200
• Assay: ≥98.0% (T)
• form: solid
• anion traces: chloride (Cl^-): ≤100 mg/kg; sulfate (SO₄^2-): ≤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
• SMILES string: [Na+].[H]O[H].[H]O[H].[H]O[H].C[As](C)([O-])=O
• InChI: 1S/C2H7AsO2.Na.3H2O/c1-3(2,4)5;;;;/h1-2H3,(H,4,5);;3*1H2/q;+1;;;/p-1
• InChI key: RLGWPHBPRCROJO-UHFFFAOYSA-M

Description

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.

Application

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

Safety Information

• Pictograms: GHS06,GHS08,GHS09
• Signal Word: Danger
• Hazard Statements: H301 + H331,H350,H410
• Precautionary Statements: P202 - P261 - P264 - P273 - P301 + P310 - P304 + P340 + P311
• Hazard Classifications: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B
• Storage Class Code: 6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 3
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves