Product Name:1,8-Naphthalic anhydride(81-84-5):

Molecular formula C₁₂H₆O₃
Formula Weight:198.17
Density:1.449 g/cm³
Melting Point:269 °C
Boiling Point:407.5 °C at 760 mmHg
Refractive Index:1.712
Flash Point: 206.8 °C 
Water Solubility: decomposes
Sensitive: Moisture Sensitive 
Appearance:beige to light brown powder
Product Categories: Intermediates of Dyes and Pigments;Oxygen cyclic compounds;Naphthalene derivatives
Synonyms of 1,8-Naphthalic anhydride(81-84-5):1,8-naphthalenediocanhydride;1,8-Naphthoic anhydride;1,8-Napthalic anhydride;ai3-09071;Benzo[de]isochromene-1,3-dione;Naphthalenedicarboxylic-1,8-anhydride;naphthalenedicarboxylicanhydride;naphthalic
Molecular Structure of 1,8-Naphthalic anhydride(81-84-5):

LD50/LC50: RTECS:
CAS# 81-84-5: Oral, mouse: LD50 = 1600 mg/kg;
Oral, rat: LD50 = 12340 mg/kg;
Skin, rabbit: LD50 = >2025 mg/kg;
Carcinogenicity: 1,8-Naphthalic anhydride - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
Other: The toxicological properties have not been fully investigated. See actual entry in RTECS for complete information.

Reported in EPA TSCA Inventory.

Low toxicity by ingestion and skin contact. When heated to decomposition it emits acrid smoke and irritating fumes. See also ANHYDRIDES.
Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin
Safety Statements: 26-37/39-24/25 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S37/39: Wear suitable gloves and eye/face protection
S24/25: Avoid contact with skin and eyes
WGK Germany: 2
RTECS: QK5350000
F: 21
HS Code: 29173980

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols:Not available 
Risk Phrases: 
Safety Phrases:
S 24/25 Avoid contact with skin and eyes. 
WGK (Water Danger/Protection)
CAS# 81-84-5: Not available
Canada
CAS# 81-84-5 is listed on Canada's NDSL List
US Federal
TSCA
CAS# 81-84-5 is listed on the TSCA Inventory.