Melting point :−30 °C(lit.)
Boiling point :232-233 °C(lit.)
Density :1.064 g/mL at 25 °C(lit.)
vapor pressure :3.33-97.9Pa at 20-58.5℃
refractive index :n20/D 1.568(lit.)
Flash point :210 °F
storage temp. :Keep in dark place,Sealed in dry,Room Temperature
solubility :20g/l
form :Liquid
pka :9.66±0.20(Predicted)
color :Clear yellow to brown
Water Solubility :Soluble in water at 20°C 20g/L.
BRN :116156
InChIKey :UWYZHKAOTLEWKK-UHFFFAOYSA-N
CAS DataBase Reference :91-21-4(CAS DataBase Reference)
EPA Substance Registry System :Isoquinoline, 1,2,3,4-tetrahydro- (91-21-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H310 Fatal in contact with skin Acute toxicity,dermal Category 1, 2 Danger P262, P264, P270, P280, P302+P350,P310, P322, P361, P363, P405, P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312 H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501 H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.