4-(Hydroxymercury)benzoic acid sodium salt
Synonym(s):p-Chloromercuribenzoate;p-Hydroxymercuribenzoic acid sodium salt;4-(Hydroxymercuri)benzoic acid sodium salt;PCMB;Sodium 4-(hydroxymercurio)benzoate
- CAS NO.：138-85-2
- Empirical Formula: C7H4HgNaO3
- Molecular Weight: 359.69
- MDL number: MFCD00002527
- EINECS: 205-340-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-09-12 18:56:25
What is 4-(Hydroxymercury)benzoic acid sodium salt?
Chemical properties
White crystalline powder
Safety Profile
Poison by intraperitoneal route. Mutation data reported. When heated to decomposition it emits toxic fumes of Hg and NazO. See also MERCURY COMPOUNDS.
Properties of 4-(Hydroxymercury)benzoic acid sodium salt
| Melting point: | ≥300 °C |
| storage temp. | Poison room |
| form | Crystalline Powder |
| color | White |
| BRN | 6118796 |
| CAS DataBase Reference | 138-85-2(CAS DataBase Reference) |
| EPA Substance Registry System | Mercurate(1-), (4-carboxylatophenyl)hydroxy-, sodium (138-85-2) |
Safety information for 4-(Hydroxymercury)benzoic acid sodium salt
| Signal word | Danger |
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H373:Specific target organ toxicity, repeated exposure H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P262:Do not get in eyes, on skin, or on clothing. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P314:Get medical advice/attention if you feel unwell. |
Computed Descriptors for 4-(Hydroxymercury)benzoic acid sodium salt
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