1,4-Naphthoquinone

  • 1,4-Naphthalenedione
  • 1,4-Naphthylquinone
  • p-Naphthoquinone
Formula
C10H6O2
Structure
Description
Yellow needles or brownish green powder with an odor of benzoquinone.
Uses
Polymerization regulator for rubber and polyester resins, synthesis of dyes and pharmaceuticals, algicide, fungicide.

Registry Numbers and Inventories.
CAS
130-15-4
EC (EINECS/ELINCS)
204-977-6
EC Class
very toxic, irritant, sensitizing, dangerous for the environment
S 22 36/37 45
RTECS
QL7175000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector
UN (DOT)
2811
Merck
12,6482
Beilstein/Gmelin
878524
Beilstein Reference
4-07-00-02422
RCRA
U166
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H6O2
Formula mass
158.16
Melting point, °C
124
Boiling point, °C
298
Vapor pressure, mmHg
0.0013 (25 C)
Vapor density (air=1)
5.46
Density
1.422 g/cm3
Solubility in water
Slightly soluble
Partition coefficient, pKow
1.71
Heat of vaporization
53.8 kJ/mol
Heat of combustion
-4604 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
9
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents - strong reducing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
111
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Containers may explode when heated. Non-combustible, substance itself does not burn but may decompose upon heating to produce irritating, corrosive and/or toxic fumes. Extinguishing media: Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
When heated, it emits toxic fumes.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. Prolonged contact may cause severe eye irritation or burns.
   Ingestion
Harmful if swallowed. May cause irritation of the digestive tract. Ingestion may cause the following: a decreased number of erythrocytes in the blood, decreased hemoglobin levels in the blood and depressed phagocytic activity of leukocytes.
   Inhalation
Effects may be delayed. May cause respiratory tract irritation.
   Skin
Causes skin irritation. May cause skin burns. Effects may be delayed. May cause discoloration, erythema, swelling, and the formation of papules and vesicles.
   Eyes
Causes eye irritation. May cause eye burns. Quinones were suspected and shown to cause discoloration of the cornea. May cause visual disturbances.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
NTD
 
HS Code
2914 69 10