| Product Identification | Back to Contents | 【Product Name】
4-Hydroxybenzenecarboxylic acid | 【Synonyms】
4-Carboxyphenol
Paraben acid
p-Hydroxybenzoic acid
p-Salicylic acid | 【CAS】
99-96-7 | 【Formula】
C7H6O3 | 【Molecular Weight】
138.12 | 【EINECS】
202-804-9 | 【RTECS】
DH1925000 | 【RTECS Class】
Drug | 【Merck】
13,4837 | 【Beilstein/Gmelin】
970950 | 【Beilstein Reference】
4-10-00-00345 | 【EC Class】
irritant |
| Physical and Chemical Properties | Back to Contents | 【Appearance】
White to off-white. | 【Solubility in water】
Very soluble | 【Melting Point】
210 - 211 | 【Boiling Point】
336 | 【Vapor Pressure】
4E-5 (25 C) | 【Density】
1.398 g/cm3 | 【pKa/pKb】
4.57 (pKa) | 【Partition Coefficient】
1.58 | 【Heat Of Vaporization】
61.1 kJ/mol | 【Usage】
Substance is used in org. | 【Vapor Density】
1.46 | 【Refractive Index】
1.53 |
| First Aid Measures | Back to Contents | 【Ingestion】
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. | 【Inhalation】
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. | 【Skin】
Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water. | 【Eyes】
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. |
| Handling and Storage | Back to Contents | 【Storage】
Store in a cool, dry place. Keep container closed when not in use. | 【Handling】
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. |
| Hazards Identification | Back to Contents | 【Ingestion】
May cause irritation of the digestive tract. Ingestion of large amounts may cause systemic effects such as nausea, stomach pain, rapid breathing, sweating, convulsions, coma, cardiovascular collapse and possible death. | 【Inhalation】
Dust is irritating to the respiratory tract. May cause effects similar to those described for ingestion. | 【Skin】
May cause skin irritation. | 【Eyes】
May cause severe eye irritation. May result in corneal injury. | 【EC Risk Phrase】
R 36/37/38 | 【EC Safety Phrase】
S 26 36 |
| Exposure Controls/Personal Protection | Back to Contents | 【Personal Protection】
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin. | 【Respirators】
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. | 【Poison Class】
4 |
| Fire Fighting Measures | Back to Contents | 【Flash Point】
171 | 【Autoignition】
250 | 【Fire Fighting】
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. |
| Stability and Reactivity | Back to Contents | 【Disposal Code】
4 | 【Stability】
Stable under normal temperatures and pressures. | 【Incompatibilities】
Strong oxidizing agents. | 【Decomposition】
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide. |
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