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Sodium pyrophosphate dibasic

Name: Sodium pyrophosphate dibasic
Brand: SIGMA

BioUltra, ≥99.0% (T)

Synonym(s):

Disodium dihydrogen pyrophosphate, Sodium diphosphate dibasic

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About This Item

Linear Formula:

Na₂H₂P₂O₇

CAS Number:

7758-16-9

Molecular Weight:

221.94

NACRES:

NA.25

PubChem Substance ID:

57652309

UNSPSC Code:

12161700

EC Number:

231-835-0

MDL number:

MFCD00014246

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Properties

product line

BioUltra

Quality Segment

200

assay

≥99.0% (T)

form

powder

impurities

insoluble matter, passes filter test

loss

≤0.5% loss on drying, 200 °C

pH

3.5-4.5 (20 °C, 0.1 M in H₂O, freshly prepared)

solubility

H₂O: 0.1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg, As: ≤0.2 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤50 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤10 mg/kg, K: ≤300 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg

λ

1 M in H₂O

UV absorption

λ: 260 nm A_max: 0.11, λ: 280 nm A_max: 0.09

SMILES string

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

InChI

1S/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2

InChI key

GYQBBRRVRKFJRG-UHFFFAOYSA-L

Description

Application

Sodium pyrophosphate dibasic has been used:

as a setting retardant
as a component of STOP-washing buffer for in gel kinase assay
as protease and phosphatase inhibitor in the preparation of western blot lysis buffer

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This Item	71636	S7907	S8282
Sigma-Aldrich 71501 Sodium pyrophosphate dibasic	Sigma-Aldrich 71636 Sodium phosphate dibasic	Sigma-Aldrich S7907 Sodium phosphate dibasic	Sigma-Aldrich S8282 Sodium phosphate monobasic
assay ≥99.0% (T)	assay ≥99.5% (T)	assay ≥99.0%	assay ≥99.0%
product line BioUltra	product line BioUltra	product line BioXtra	product line BioXtra
Quality Level 200	Quality Level 200	Quality Level 200	Quality Level 300
form powder	form coarse powder, fine crystals	form powder or crystals	form powder
solubility H₂O: 0.1 M at 20 °C, clear, colorless	solubility H₂O: 0.5 M at 20 °C, clear, colorless	solubility H₂O: 1 M at 20 °C, clear, colorless	solubility H₂O: 1 M, clear, colorless
pH 3.5-4.5 (20 °C, 0.1 M in H₂O, freshly prepared)	pH 8.8-9.4 (25 °C, 0.5 M in H₂O)	pH 8.0-11.0 (20 °C, 1 M in H₂O)	pH 4.0-6.0 (20 °C, 1 M in H₂O)

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pictograms

GHS07

signalword

Warning

hcodes

H319

pcodes

P305 + P351 + P338

Hazard Classifications

Eye Irrit. 2

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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