4-Aminophenol

Melting point :188 °C
Boiling point :284 °C
Density :1.29
vapor pressure :0.4 hPa (110 °C)
refractive index :1.5444 (estimate)
Flash point :189 °C
storage temp. :2-8°C
solubility :water: slightly soluble
form :Crystalline Powder
pka :5.48, 10.30(at 25℃)
color :White to cream
Water Solubility :1.5 g/100 mL (20 ºC)
Sensitive :Air & Light Sensitive
Decomposition :284 °C
Merck :14,462
BRN :385836
Henry's Law Constant :2.7×10⁴ mol/(m³Pa) at 25℃, Duchowicz et al. (2020)
Stability :Stable, though may discolour in air. Incompatible with acids, chloroformates, strong oxidizing agents.
Cosmetics Ingredients Functions :HAIR DYEING
Cosmetic Ingredient Review (CIR) :4-Aminophenol (123-30-8)
InChI :1S/C6H7NO/c7-5-1-3-6(8)4-2-5/h1-4,8H,7H2
InChIKey :PLIKAWJENQZMHA-UHFFFAOYSA-N
SMILES :Nc1ccc(O)cc1
LogP :-0.09-0.04 at 25℃
CAS DataBase Reference :123-30-8(CAS DataBase Reference)
NIST Chemistry Reference :Phenol, 4-amino-(123-30-8)
EPA Substance Registry System :p-Aminophenol (123-30-8)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H316 Causes mild skin irritation Skin corrosion/irritation Category 3 Warning P332+P313 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H320 Causes eye irritation Serious eye damage/eye irritation Category 2B Warning P264, P305+P351+P338,P337+P313 H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501 H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501 H361 Suspected of damaging fertility or the unborn child Reproductive toxicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501 H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 Wear respiratory protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P337+P313 IF eye irritation persists: Get medical advice/attention. P342+P311 IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician. P391 Collect spillage. Hazardous to the aquatic environment P405 Store locked up. P501 Dispose of contents/container to..…