Melting point :161-165 °C (lit.) 162-164 °C
Boiling point :246.06°C (rough estimate)
Density :1.0924 (rough estimate)
bulk density :500kg/m3
vapor pressure :0.8 hPa (149 °C)
refractive index :1.5178 (estimate)
Flash point :175 °C
storage temp. :Store below +30°C.
solubility :4g/l
pka :9.10±0.40(Predicted)
form :Powder
color :White to pinkish to beige-grayish
PH :6 (1g/l, H2O, 20℃)
Water Solubility :slightly soluble
BRN :742375
Henry's Law Constant :2.0×10⁵ mol/(m³Pa) at 25℃, Ebert et al. (2023)
Cosmetics Ingredients Functions :HAIR DYEING
Cosmetic Ingredient Review (CIR) :2,3-Dihydroxynaphthalene (92-44-4)
InChI :1S/C10H8O2/c11-9-5-7-3-1-2-4-8(7)6-10(9)12/h1-6,11-12H
InChIKey :JRNGUTKWMSBIBF-UHFFFAOYSA-N
SMILES :Oc1cc2ccccc2cc1O
CAS DataBase Reference :92-44-4(CAS DataBase Reference)
NIST Chemistry Reference :2,3-Naphthalenediol(92-44-4)
EPA Substance Registry System :2,3-Naphthalenediol (92-44-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P501 Dispose of contents/container to..…