1-Naphthol

  • 1-Hydroxynaphthalene
Formula
C10H7OH
Structure
Description
Colorless or yellow crystals or powder, phenolic odor.
Uses
For the dyes mordant black 11, acid brown 6, chemical intermediate for dye coupling agents for azo dyes, plant growth regulator.

Registry Numbers and Inventories.
CAS
90-15-3
EC (EINECS/ELINCS)
201-969-4
EC Index Number
604-029-00-5
EC Class
Harmful; Irritant
R 21/22 37/38 41
S 22 26 37/39
RTECS
QL2800000
RTECS class
Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
2811
Merck
12,6470
Beilstein/Gmelin
1817321
Beilstein Reference
4-06-00-04208
Swiss Giftliste 1
G-2558
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H8O
Formula mass
144.17
Melting point, °C
94
Boiling point, °C
282
Vapor pressure, mmHg
0.0014 (25 C)
Vapor density (air=1)
4.5
Saturation Concentration
0.1% at 94 C (calculated)
Density
1.224 g/cm3
Solubility in water
Insoluble
Refractive index
1.6224 (99 C)
pKa/pKb
9.40 (pKa)
Partition coefficient, pKow
2.85
Heat of fusion
23.49 kJ/mol
Heat of vaporization
54.8 kJ/mol
Heat of combustion
-4956 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.
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
3
Stability
Stable under normal temperatures and pressures. Substance undergoes color change upon exposure to light and air.
Incompatibilities
Strong oxidizing agents, strong bases, acid chlorides, acid anhydrides, halogens.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.

Fire.
Flash Point,°C
125
Autoignition, °C
510
Upper exp. limit, %
5.0
Lower exp. limit, %
0.8
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. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
Combustible.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
2
Exposure effects
May cause liver and kidney damage. May cause anemia and other blood cell abnormalities.
   Ingestion
May be harmful if swallowed. Overexposure may result in hemolytic anemia, leading to kidney failure. Symptoms include diarrhea, headache, perspiration, listlessness and
   Inhalation
May cause severe irritation of the upper respiratory tract with pain, burns, and inflammation. May cause effects similar to those described for ingestion.
   Skin
Harmful if absorbed through the skin. Causes skin burns.
   Eyes
Causes eye burns. May cause eye injury.

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 not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Discard contaminated clothing in a manner which limits further exposure. SPEEDY ACTION IS CRITICAL!
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
HS Code
2907 15 10