Citric acid CAS# 77-92-9
Citric acid is a white, crystalline, weak organic acid present in most plants and many animals as an intermediate in cellular respiration. Citric acid contains three carboxyl groups making it a carboxylic, more specifically a tricarboxylic, acid.the name citrus originates from the Greek kedromelon meaning apple of melon for the fruit citron. Greek works mention kitron, kitrion, or kitreos for citron fruit, which is an oblong fruit several inches long from the scrublike tree Citrus medica. Lemons and limes have high citric acid content, which may account for up to 8% of the fruit’s dry weight.
Citric acid CAS# 77-92-9
| Citric acid Basic information |
| Product Name: | Citric acid |
| Synonyms: | Citric acid Vetec(TM) reagent grade, 99%;Buffer solution according to Weise;FLUORESCEIN DISODIUM SALT USP GRADE;PROPYLENE GLYCOL HIGH PURITY GRADE;READY LADDER 50BP DNA MARKER;YELLOW PRIMARY SOLUTION;CITRICACID,ANHYDROUS,PREMIUM(BULK;CITRICACID,ANHYDROUS,USP(BULK |
| CAS: | 77-92-9 |
| MF: | C6H8O7 |
| MW: | 192.12 |
| EINECS: | 201-069-1 |
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| Mol File: | 77-92-9.mol |
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| Citric acid Chemical Properties |
| Melting point | 153-159 ??C (lit.) |
| Boiling point | 248.08??C (rough estimate) |
| density | 1.67 g/cm3 at 20 ??C |
| vapor density | 7.26 (vs air) |
| vapor pressure | <0.1 hPa (20 ??C) |
| refractive index | 1.493~1.509 |
| FEMA | 2306 | CITRIC ACID |
| Fp | 100 ??C |
| storage temp. | 2-8??C |
| solubility | Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 ??C. |
| form | grit |
| pka | 3.14(at 20??) |
| color | White |
| Odor | Odorless |
| PH | 3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution); |
| Odor Type | odorless |
| explosive limit | 8%, 65??F |
| Water Solubility | soluble in Water (1174g/L at 10??C, 1809g/L at 30??C, 3825g/L at 80??C). |
| Sensitive | Hygroscopic |
| ??max | ??: 260 nm Amax: 0.20 ??: 280 nm Amax: 0.10 |
| Merck | 14,2326 |
| JECFA Number | 218 |
| BRN | 782061 |
| Stability: | Stable. Incompatible with bases, strong oxidizing agents, reducing agents, metal nitrates. |
| InChIKey | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| LogP | -1.64 |
| CAS DataBase Reference | 77-92-9(CAS DataBase Reference) |
| NIST Chemistry Reference | 1,2,3-Propanetricarboxylic acid, 2-hydroxy-(77-92-9) |
| EPA Substance Registry System | Citric acid (77-92-9) |
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