Melting point :55-58 °C(lit.)
Boiling point :83-84 °C (0.7501 mmHg)
Density :1.13
vapor pressure :0.56Pa at 25℃
refractive index :1.4500 (estimate)
Flash point :>230 °F
storage temp. :2-8°C
solubility :The solubility of o-phthalaldehyde is 3g/100 mL diisopropyl ether, 5g/100mL deionized water, 20g/100mL chloroform, or 20g/100mL acetone at 20°C.
form :powder
color :yellow
PH :7 (53g/l, H2O, 20℃)
Water Solubility :soluble
Sensitive :Air Sensitive
Merck :14,7368
BRN :878317
Exposure limits :ACGIH: SL .025 mg/100 cm2; Ceiling 0.1 ppb (Skin)
Stability :Stable. Air sensitive. Incompatible with strong oxidizing agents, strong bases.
InChIKey :ZWLUXSQADUDCSB-UHFFFAOYSA-N
LogP :0.99 at 30℃
CAS DataBase Reference :643-79-8(CAS DataBase Reference)
NIST Chemistry Reference :O-phthalaldehyde(643-79-8)
EPA Substance Registry System :1,2-Benzenedicarboxaldehyde (643-79-8)

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 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 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning 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:	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.