27487
Fluka

Citric acid

BioUltra, anhydrous, ≥99.5% (T)

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Molecular Formula

HOC(COOH)(CH₂COOH)₂

Molecular Weight

192.12

CAS Number

77-92-9

Beilstein Registry Number

782061

MDL number

MFCD00011669

PubChem Substance ID

24856611

EG/EC Number

201-069-1

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Descriptions

Other Notes

Buffer component for triple-column amino acid analysis¹; Optimal buffer for dissociation of radioiodinated antibodies from viable murine tumor cells²

Properties

product line

BioUltra

assay

≥99.5% (T)

expl. lim.

8 %± , 65 °F

total impurities

insoluble matter, passes filter test

ign. residue

≤0.05% (as SO₄)

loss

≤0.5% loss on drying, 110 °C

1.0-2.0 (25 °C, 1 M in H₂O)

pKa

(1) 3.13, (2) 4.76, (3) 6.4

153-159 °C(lit.)

solubility

H₂O: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): ≤5 mg/kg

oxalate (C₂O₄^2-): ≤500 mg/kg

phosphate (PO₄^-): ≤5 mg/kg

sulfate (SO₄^2-): ≤20 mg/kg

tartrate (C₄H₄O₆^2-): ≤2000 mg/kg

cation traces

Al: ≤5 mg/kg

As: ≤0.1 mg/kg

Ba: ≤5 mg/kg

Bi: ≤5 mg/kg

Ca: ≤10 mg/kg

Cd: ≤5 mg/kg

Co: ≤5 mg/kg

Cr: ≤5 mg/kg

Cu: ≤5 mg/kg

Fe: ≤5 mg/kg

K: ≤50 mg/kg

Li: ≤5 mg/kg

Mg: ≤5 mg/kg

Mn: ≤5 mg/kg

Mo: ≤5 mg/kg

Na: ≤50 mg/kg

Ni: ≤5 mg/kg

Pb: ≤5 mg/kg

Sr: ≤5 mg/kg

Zn: ≤5 mg/kg

1 M in H₂O

UV absorption

λ: 260 nm A_max: 0.20

λ: 280 nm A_max: 0.10

Gene Information

human ... SRC(6714)

References

Cited Reference

1. T.N. Ferraro, T.A. Hare Anal. Biochem. 143, 82, (1984) abstract

2. R. Ehrlich, I.P. Witz J. Immunol. Methods 26, 345, (1979) abstract

Merck

Merck 13,2350

Beilstein

Beil. 3,IV,1272

reference

Aldrich MSDS 1, 477:A / Arctander, 657 / Corp MSDS 1 (1), 892:B / FT-IR 2 (1), 812:D / FT-IR 1 (1), 524:B / FT-NMR 1 (1), 814:A / Fenaroli, 318 / IR-Spectra (3), 307:B / IR-Spectra (2), 276:H / NMR-Reference 2 (1), 458:D / RegBook 1 (1), 569:H / Sax 6, 796 / Sigma FT-IR 1 (2), 401:D / Structure Index 1, 81:B:6

Safety

Hazard Codes

Risk Statements

Safety Statements

26-39

WGK Germany

RTECS

GE7350000

LEL

8.00%(V)