1,4,5,8-Naphthalenetetracarboxylic dianhydride

Chemical Name: 1,4,5,8-Naphthalenetetracarboxylic dianhydride
CAS No.: 81-30-1
EINECS: 201-342-5
RTECS: QK3695000
Molecular Formula: C₁₄H₄O₆
Molecular Weight: 268.18 g/mol
Melting Point: >300 °C(lit.)
Density: 1.79 g/cm³ 
Flash Point: 280.4 °C
Boiling Point: 617 °C at 760 mmHg
Following is the structure of 1,4,5,8-Naphthalenetetracarboxylic acid-1,8:4,5-dianhydride (81-30-1):

Product Categories about 1,4,5,8-Naphthalenetetracarboxylic acid-1,8:4,5-dianhydride (81-30-1) are Intermediates of Dyes and Pigments ; Naphthalene derivatives ; Acid Anhydrides, etc. (Reagents for Conducting Polymer Research) ; Aromatic Tetracarboxylic Dianhydrides (for High-Performance Polymer Research) ; Functional Materials ; Reagent for High-Performance Polymer Research ; Reagents for Conducting Polymer Research ; Highly Purified Reagents ; Other Categories ; Refined Products by Sublimation
The chemical synonymous of 1,4,5,8-Naphthalenetetracarboxylic acid-1,8:4,5-dianhydride (81-30-1) are 1,4,5,8-Naphthalenetetracarboxylic dianhydride ; IsoChromeno[6,5,4-def]Isochromene-1,3,6,8-tetraone ; Naphthalene-1,4,5,8-tetracarboxylic Acid dianhydride ; Naphthalene-1,4,5,8-tetracarboxylic dianhydride ; (2)Benzopyrano(6,5,4-def)(2)benzopyran-1,3,6,8-tetrone ; [2]Benzopyrano[6,5,4-Def][2]benzopyran-1,3,6,8-tetrone ; 1,4,5,8-Naphthalenetetracarboxylic 1,8:4,5-dianhydride ; 1,4,5,8-Naphthalenetetracarboxylic acid anhydride

Poison by intratracheal route. Mildly toxic by ingestion. When heated to decomposition it emits acrid smoke and irritating fumes. See also ANHYDRIDES.
Hazard Codes:
Xi: Irritant
Risk Statements about 1,4,5,8-Naphthalenetetracarboxylic acid-1,8:4,5-dianhydride (81-30-1):
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements about 1,4,5,8-Naphthalenetetracarboxylic acid-1,8:4,5-dianhydride (81-30-1):
S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36 Wear suitable protective clothing.