Melamine

  • Cyanurotriamide
  • 2,4,6-Triamino-1,3,5-triazine
  • 1,3,5-triazine-2,4,6-triamine
Formula
C3H6N6
Structure
Description
Colorless to white monoclinic crystals or prisms or white powder.
Uses
Organic synthesis, leather tanning.

Registry Numbers and Inventories.
CAS
108-78-1
EC (EINECS/ELINCS)
203-615-4
S 22 24/25
RTECS
OS0700000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
Merck
13,5834
Beilstein/Gmelin
124341
Beilstein Reference
4-26-00-01253
Swiss Giftliste 1
G-2393
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H6N6
Formula mass
126.12
Decomposition point, °C
352 - 354
Vapor pressure, mmHg
2E12 (25 C)
Vapor density (air=1)
4.34
Critical temperature
588
Critical pressure
92.9
Density
1.573 g/cm3 (14 C)
Solubility in water
4.9 g/L
Refractive index
1.65 (20 C)
pKa/pKb
8.34 (pKb)
Partition coefficient, pKow
-0.64
Heat of combustion
-1967 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Wash clothing before reuse.
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 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, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents; strong acids.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, cyanide fumes, nitrogen.

Fire.
Flash Point,°C
325
Autoignition, °C
> 600
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. Use agent most appropriate to extinguish fire.
Combustion products
The evolution of hydrogen cyanide during combustion and pyrolysis of melamine resin was detected.

Health.
Poison_Class
4
Exposure effects
May cause cancer according to animal studies. May cause reproductive and fetal effects.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema.
   Skin
Prolonged and/or repeated contact may cause irritation and/or dermatitis.
   Eyes
Causes eye irritation.

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.
   Skin
Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. 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 immediately.

Transport.
HS Code
2933 69 80