Melting point :191-192 °C (dec.)
Boiling point :246.06°C (rough estimate)
Density :1.0924 (rough estimate)
refractive index :1.5178 (estimate)
storage temp. :Refrigerator
solubility :DMSO (Slightly), Methanol (Slightly)
pka :pK1:9.37;pK2:10.93 (26°C，μ=0.65)
color :Grey
Water Solubility :slightly soluble
BRN :1307689
CAS DataBase Reference :571-60-8(CAS DataBase Reference)
NIST Chemistry Reference :1,4-Naphthalenediol(571-60-8)
EPA Substance Registry System :1,4-Naphthalenediol (571-60-8)

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 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment. 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. 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.