Hexamine

  • Methenamine
  • Hexamethylenetetraamine
Formula
C6H12N4
Structure
Description
Odorless white crystalline powder or colorless lustrous crystals. Sublimes in a vacuum at about 505 F with some decomposition.
Uses
In adhesives, coatings, and sealing compounds, in the chemical detection of metals, in the preservation of hides, as cross-linking agent for hardening phenol-formaldehyde resin and vulcanizing rubber, as corrosion inhibitor for steel, as dye fixative, as fuel tablets for camping stoves, as stabilizer for lubricating and insulating oils, with sodium phenate and naoh as absorber of poisonous gases, the parent substance for the manufacture of explosive compounds, antimicrobial food additive.

Registry Numbers and Inventories.
CAS
100-97-0
EC (EINECS/ELINCS)
202-905-8
EC Index Number
612-101-00-2
EC Class
Highly flammable; Sensitising
R 11 42/43
S 16 22 24 37
RTECS
MN4725000
RTECS class
Tumorigen; Drug; Mutagen
UN (DOT)
1328
Merck
13,5994
Beilstein/Gmelin
2018
Beilstein Reference
5-26-11-00096
EPA OPP
45501
Swiss Giftliste 1
G-1683
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H12N4
Formula mass
140.19
Boiling point, °C
253
Vapor pressure, mmHg
0.019 (25 C)
Vapor density (air=1)
4.9
Density
1.331 g/cm3 (-5 C)
Solubility in water
Insoluble
Refractive index
1.591 (20 C)
pKa/pKb
8.72 (pKb)
Partition coefficient, pKow
2.17
Heat of vaporization
49.0 kJ/mol
Heat of combustion
-4288 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Store in a cool, dry place. Keep container closed when not in use. Keep away from strong acids. Flammables-area.
Handling
Wash thoroughly after handling. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Use a spark-proof tool.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong acids, sodium peroxide.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, formaldehyde.

Fire.
Flash Point,°C
104
Autoignition, °C
390
Lower exp. limit, %
15.0
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. Containers may explode in the heat of a fire. Dust can be an explosion hazard when exposed to heat or flame. Flammable solid. May re-ignite after fire is extinguished. May be ignited by friction, heat, sparks, or flame. To extinguish fire, use water fog, dry chemical, carbon dioxide, or regular foam. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
This chemical is combustible.
Combustion products
Formaldehyde gas and ammonia may be given off when hot.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
5
Exposure effects
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   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
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
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   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.
UN number
1328
Response guide
Hazard class
4.1
Packing Group
III
 
USCG CHRIS Code
HMT
 
7 Aliphatic amines
HS Code
2933 69 20
 
Std. Transport #
4917464
 
IMO Pollution Category
D