1,2-Naphthalenedione
[CAS 524-42-5]

Identification

• Classification: Chemical reagent >> Organic reagent >> Bicyclic compound
• Name: 1,2-Naphthalenedione
• Synonyms: NSC 9831; SID 8139964; o-Naphthoquinone; beta-Naphthoquinone; 1,2-Naphthoquinone
• Molecular Formula: C₁₀H₆O₂
• Molecular Weight: 158.15
• CAS Registry Number: 524-42-5
• EC Number: 208-360-2

Properties

• Solubility: Slightly soluble (1.2 g/L) (25 °C), Calc.^*
• Density: 1.450 g/cm³ (25 °C)^**
• Melting point: 214-216 °C (decomp)^***
• Boiling point: 296.1±33.0 °C (760 Torr), Calc.^*
• Flash point: 117.4±11.0 °C, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^** "Hazardous Substances Data Bank" data were obtained from the National Library of Medicine (US)

^*** van Alphen, J.

Safety Data

• Hazard Symbols: Xn
• Risk Statements: R22;R36/37/38
• Safety Statements: S26;S36

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319
Acute toxicity	Acute Tox.	4	H302
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	4	H312
Eye irritation	Eye Irrit.	2A	H319
Acute toxicity	Acute Tox.	4	H332