3,4-Dihydroxybenzoic acid CAS#: 99-50-3; ChemWhat Code: 101126
| Names & Identifiers | 
| Product Name | 3,4-Dihydroxybenzoic acid | 
| Synonyms | Carbohydroquinonic acid;Hypogallic acid;Protocatechuic aci;Protocatechuic acid, 4-Carboxybenzene-1,2-diol, 4-Carboxycatechol;3,4- twohydroxybenzoic acid/protocatechuicacid;3,4-Dihydroxybenzoic acid >=97.0% (T);3,4-Dihydroxybenzoic acid Vetec(TM) reagent grade, 97%;3,4-Dihydroxybenzoic acid, >=99% | 
| CAS Registry Number | 99-50-3 | 
| Molecular Formula | C7H6O4 | 
| Molecular Weight | 154.12 | 
| EINECS | 202-760-0 | 
| Other Registry Numbers | ; | 
| More Identifiers on PubChem | IUPA Names, InChI, InChI Key, Canonical SMILES, etc. | 
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| Chemical & Physical Properties | 
| Melting point | 197-200 °C (dec.)(lit.) | 
| Density | 1.54 | 
| FEMA | 4430 | 3,4-DIHYDROXYBENZOIC ACID | 
| Storage | Store below +30°C. | 
| Solubulity | 20g/l | 
| form | Fine Crystalline Powder | 
| pka | 4.48(at 25℃) | 
| Color | Beige to brown | 
| Water Solubility | Soluble in hot alcohol and ether. Slightly soluble in water. | 
| Sensitive | Air Sensitive | 
| Merck | 14,7894 | 
| BRN | 1448841 | 
| Stability: | Stable. Incompatible with strong oxidizing agents, strong bases. | 
| More Properties From PubChem | Topological Polar Surface Area, Monoisotopic Mass, etc. | 
| EPA Substance Registry System | Benzoic acid, 3,4-dihydroxy-(99-50-3) | 
| Safety & Hazards(Codes & Phrases) | 
| Hazard Codes | Xi | 
| R Phrase | 36/37/38 | 
| S Phrase | 26-36-37/39 | 
| WGK Germany | 3 | 
| RTECS | UL0560000 | 
| HS Code | 29182990 | 
| More Safety & Hazards From PubChem | Signal, GHS Hazard Statements, Precautionary Statement Codes, etc. | 
| Literature | 
| Literature on PubChem | Synthesis References, Metabolite References, etc. | 
| Patents | 
| Patents on PubChem | Related Patents Of This Product | 
| Transportation, Storage & Usage | 
| Transportation | No Information | 
| Storage | No Information | 
| Usage | No Information | 
| Spectral Properties | 
| No Information | 
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