1-Aziridinyl phosphine oxide (tris)

  • tris(1-Aziridinyl)phosphine oxide
  • Tri(aziridin-1-yl)phosphine oxide
Formula
C6H12N3OP
Structure
Description
An aqueous solution of a colorless crystalline solid.
Uses
Flame retardant for cotton, chemosterilant for insects, pesticide for mites & ticks, photographic emulsion hardener, agent in the permanent press treatment of cotton, agent in textile dyeing, & agent for polymer stabilization are former uses.

Registry Numbers and Inventories.
CAS
545-55-1
EC (EINECS/ELINCS)
208-892-5
RTECS
SZ1750000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector
UN (DOT)
2501
Merck
12,9804
Beilstein/Gmelin
145971
Beilstein Reference
4-20-00-00048
Swiss Giftliste 1
G-2255
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H12N3OP
Formula mass
173.15
Melting point, °C
41
Boiling point, °C
90 - 91 (0.3 torr)
Density
1.225 g/cm3 (25 C)
Solubility in water
Very soluble
Refractive index
1.5107 (25 C)
pKa/pKb
7.25 (pKb)

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Protective clothing and gloves to prevent contact with skin; goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Apply water spray or mist to knock down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Remove trapped material with suction hoses.
Stability
No data.
Incompatibilities
May react with aqueous solutions of acids or strong bases.
Decomposition
Decomposition in acid soln with formation of aziridine.

Fire.
Fire fighting
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Solid streams of water may be ineffective. Use alcohol foam, dry chemical or carbon dioxide.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
Containers may explode when heated.
Combustion products
Phosphoric acid mist may form in fire. oxides of nitrogen may form.

Health.
Poison_Class
1*
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact.
   Eyes
See Skin.

First aid
 
   Ingestion
Only symptomatic and supportive measures are available.
   Inhalation
Remove victim to fresh air.
   Skin
Flush with water at once, followed by vinegar and dilute hydrogen peroxide.
   Eyes
Flush with water at once for at least 15 min.; get medical attention.

Transport.
UN number
2501
Response guide
Hazard class
6.1
Packing Group
II; III
 
USCG CHRIS Code
TPO
 
Std. Transport #
4921552