251275
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251275
Sigma-Aldrich
Citric acid
ACS reagent, ≥99.5%
| CAS Number: | 77-92-9 |
| Linear Formula: | HOC(COOH)(CH2COOH)2 |
| Molecular Weight: | 192.12 |
| Beilstein Registry Number: | 782061 |
| EC Number: | 201-069-1 |
| MDL number: | MFCD00011669 |
| PubChem Substance ID: | 24855122 |
Description
| Packaging | 100, 500 g in poly btl |
| 2.5 kg in poly btl | |
| 5 g in glass btl |
Properties
| grade | ACS reagent |
| assay | ≥99.5% |
| 99.0-102.0% (ACS specification) | |
| expl. lim. | 8 %± , 65 °F |
| total impurities | Substances carbonizable by hot sulfuric acid, passes test |
| ≤0.005% insolubles | |
| ign. residue | ≤0.02% |
| pKa | (1) 3.13, (2) 4.76, (3) 6.4 |
| mp | 153-159 °C(lit.) |
| anion traces | chloride (Cl-): ≤0.001% |
| oxalate (C2O42-): passes test (limit about 0.003%) | |
| phosphate (PO4-): ≤0.001% | |
| sulfate (SO42-): ≤0.002% | |
| cation traces | Fe: ≤3 ppm |
| Pb: ≤2 ppm | |
| Gene Information | human ... SRC(6714) |
Safety
| Personal Protective Equipment | dust mask type N95 (US), Eyeshields, Gloves |
| Hazard Codes | Xi |
| Risk Statements | 41 |
| Safety Statements | 26-39 |
| WGK Germany | 1 |
| RTECS | GE7350000 |
| LEL | 8.00%(V) |
References
| 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 1 (1), 524:B / FT-IR 2 (1), 812:D / 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 |
