2-Naphthol

  • 2-Hydroxynaphthalene
  • 2-Naphthalenol
  • Isonaphthol
Formula
C10H8O
Structure
Description
White, lustrious, bulky leaflets or white powder. Faint phenol-like odor.
Uses
Dyes, pigments, antioxidants for rubber, fats, oils, insecticides, synthesis of fungicides, pharmaceuticals, perfumes, antiseptic.

Registry Numbers and Inventories.
CAS
135-19-3
EC (EINECS/ELINCS)
205-182-7
EC Index Number
604-007-00-5
EC Class
Harmful; Dangerous for the Environment
R 20/22 50
S 24/25 61
RTECS
QL2975000
RTECS class
Drug; Mutagen; Primary Irritant
UN (DOT)
2811
Merck
12,6471
Beilstein/Gmelin
742134
Beilstein Reference
4-06-00-04253
EPA OPP
10301
Swiss Giftliste 1
G-102109
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C10H8O
Formula mass
144.17
Melting point, °C
121.6
Boiling point, °C
286
Vapor pressure, mmHg
0.0029 (25 C)
Vapor density (air=1)
5
Odor Threshold Odor threshold 0.01 ppm - 11.4 ppm
Density
1.217 g/cm3
Solubility in water
740 mg/L
Refractive index
1.548
pKa/pKb
9.57 (pKa)
Partition coefficient, pKow
2.70
Heat of fusion
21.94 kJ/mol
Heat of vaporization
54.6 kJ/mol
Heat of combustion
-4954 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store in direct sunlight. Keep container closed when not in use. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from strong bases. Material darkens in color on storage.
Handling
Wash thoroughly after handling. Minimize dust generation and accumulation. Do not get on skin and clothing. Do not ingest or inhale. Store protected from light. Use only in a chemical fume hood. Do not breathe dust or fumes.
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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. If sweeping is necessary, use a dust suppressant agent. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures. May discolor on exposure to light. Light sensitive.
Incompatibilities
Strong oxidizing agents, strong bases, acid chlorides, acid anhydrides, antipyrine, camphor, ferric salts, menthol, phenols, potassium permanganate, urethane.
Decomposition
Carbon monoxide, carbon dioxide, toxic fumes of sodium oxide.

Fire.
Flash Point,°C
153
Autoignition, °C
550
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. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Slightly flammable. Requires preheating.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
4
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 0.1 mg/m3
Poison_Class
2
Exposure effects
Chronic inhalation may cause effects similar to those of acute inhalation. Laboratory experiments have resulted in mutagenic effects. Prolonged exposure may cause abdominal pain, nausea, vomiting, and possible convulsions. Intestinal and percutaneous absorption may lead to severe nephritis, liver injury and acute hemolytic anemia.
   Ingestion
Aspiration hazard. May cause irritation of the digestive tract. May be harmful if swallowed.
   Inhalation
May be fatal if inhaled. Causes respiratory tract irritation.
   Skin
Causes mild skin irritation.
   Eyes
Causes moderate eye irritation. May cause lens opacities and retinal changes.

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
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
20. Alcohols. Glycols
HS Code
2907 15 90