Neutral Red

  • Basic Red 5
  • C.I. 50040
  • Toluylene red
  • Nuclear Fast Red
  • 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride
  • 2,8-Phenazinediamine, N8,N8,3-trimethyl-, monohydrochloride
Formula
C15H17ClN4
Structure
Description
Green powder.
Uses
Used as a indicator (0.1% in 60% alcohol) for alkalinity of water, urea, nitrite, etc.

Registry Numbers and Inventories.
CAS
553-24-2
EC (EINECS/ELINCS)
209-035-8
RTECS
SG1400000
RTECS class
Drug; Mutagen; Natural Product
Merck
12,6571
Beilstein/Gmelin
3736166
Beilstein Reference
0-25-00-00401
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C15H17ClN4
Formula mass
288.78
Melting point, °C
290
Decomposition point, °C
290
Vapor density (air=1)
9.96
Solubility in water
50 g/L (25 C)

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. 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
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide.

Fire.
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 appropriate foam.

Health.
Poison_Class
4 (Substances and products that must be considered harmful)
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
May cause digestive tract disturbances. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation.
   Eyes
Dust may cause mechanical 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.

Transport.
HS Code
3204 13 00