N-Methyl-p-aminophenol

  • 4-(Methylamino)phenol sulfate (2:1) salt
  • N-Methyl-4-hydroxyaniline hemisulfate
  • Metatyl
  • Elon
  • Rhodol
  • Graphol
Formula
C14H18N2O2.H2SO4
Structure
Description
Off-white crystalline solid.
Uses
Photographic developer.

Registry Numbers and Inventories.
CAS
55-55-0
EC (EINECS/ELINCS)
200-237-1
EC Index Number
650-031-00-4
EC Class
Harmful; Sensitising; Dangerous for the Environment
R 22 43 48/22 50/53
S 36/37 46 60 61
RTECS
SL8650000
RTECS class
Mutagen
UN (DOT)
3077
Merck
12,6097
Beilstein/Gmelin
3919382
Beilstein Reference
3-13-00-01007
Swiss Giftliste 1
G-2426
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
2C7H9NO*H2O4S
Formula mass
344.38
Melting point, °C
86
Boiling point, °C
227
Critical temperature
450
Critical pressure
50.6
Density
1.434 g/cm3
Partition coefficient, pKow
1.14

Hazards and Protection.
Storage
Do not store in direct sunlight. 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. Absorbs oxygen from the air and will darken upon exposure.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and 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
Wash area with soap and water. 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.
Stability
Stable under normal temperatures and pressures. May discolor on exposure to light.
Incompatibilities
Acids; acid chlorides; acid anhydrides; oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Autoignition, °C
531
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. 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.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause blood abnormalities.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
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.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
3077
Response guide