1,2-NAPHTHOQUINONE

Chemical Name: 1,2-Naphthoquinone
IUPAC NAME: Naphthalene-1,2-dione
CAS No.: 524-42-5
EINECS: 208-360-2
RTECS: QL7000000
Molecular Formula: C₁₀H₆O₂
Molecular Weight: 158.15 g/mol
Melting Point: 139-142 °C (dec.)(lit.)
Density: 1.29 g/cm³
Flash Point: 117.4 °C
Boiling Point: 296.1 °C at 760 mmHg
Storage temp.: 2-8°C
Following is the structure of 1,2-Naphthoquinone (CAS No.524-42-5):

Product Categories about 1,2-Naphthoquinone (CAS No.524-42-5) are Intermediates of Dyes and Pigments ; Anthraquinones, Hydroquinones and Quinones
The chemical synonymous of 1,2-Naphthoquinone (CAS No.524-42-5) are 1,2-Dihydro-1,2-Diketo-Naphthalene ; 1,2-Naftochinon ; 1,2-Naphthaquinone ; O-Naphthoquinone ; Naphthoquinone, 1,2- ; Beta-Naphthoquinone ; 1,2-Naphthalenedione ; 1,2-Naphthoquinone

Reported in EPA TSCA Inventory.

Poison by ingestion. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Note: Irritant
Hazard Codes: Xn F Xi C
Risk Statements about 1,2-Naphthoquinone (CAS No.524-42-5):
R11:Highly flammable. 
R22:Harmful if swallowed. 
R34:Causes burns. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements about 1,2-Naphthoquinone (CAS No.524-42-5):
S16:Keep away from sources of ignition. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
Attention:
1. Storage: Store in a cool, dry place. Store in a tightly closed container
2. Handling: Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.

1,2-Naphthoquinone (CAS No.524-42-5) is a polycyclic aromatic ketone. It is a reactive metabolite of naphthalene. This compound is a quinone found in diesel exhaust particles. The accumulation of this toxic metabolite in rats from doses of naphthalene has been shown to cause eye damage, including the formation of cataracts.