n-BUTYL ISOCYANATE

PRODUCT IDENTIFICATION
CAS NO. 111-36-4

n-BUTYL ISOCYANATE
EINECS NO. 203-862-8
FORMULA C4H9NCO
MOL WT. 99.13

H.S. CODE

 2929.10
TOXICITY Oral rat LD50: 600 mg/kg
SYNONYMS 1-Isocyanatobutane; Butyl Isocyanate;
Isocyanic acid butyl ester; n-Butylisocyanat (Dutch); n-Butilo isocianato (Spanish);  Isocianato de butilo (Spanish); Isocyanate de butyle (French);
SMILES  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE clear liquid
MELTING POINT -75 C
BOILING POINT 115 - 116 C
SPECIFIC GRAVITY 0.880- 0.890
SOLUBILITY IN WATER Hydrolyses
pH  
VAPOR DENSITY  

AUTOIGNITION

  

NFPA RATINGS

 Health: 3; Flammability: 2; Reactivity: 2

REFRACTIVE INDEX

  
FLASH POINT 17 C
STABILITY Stable under ordinary conditions. Moisture sensitive

GENERAL DESCRIPTION & APPLICATIONS
Cyanic acid (the isomer of fulminic acid) is an unstable (explosive), poisonous, volatile, clear liquid with the structure of H-O-C≡N (the oxoacid formed from the pseudohalogen cyanide), which is readily converted to cyamelide and fulminic acid. There is another isomeric cyanic acid with the structure of H-N=C=O, called isocyanic acid. Cyanate group (and isocyanate group) can react with itself. Cyanuric acid (also called pyrolithic acid), white monoclinic crystal with the structure of [HOC(NCOH)2N], is the trimer of cyanic acid. The trimer of isocyanic acid is called biuret.
  • Cyanic acid: H-N=C=O or H-O-C≡N
  • Fulminic acid: (H-C=N-O) or H-C≡N-O
  • Isocyanic acid: H-N=C=O
  • Cyanuric acid: HOC(NCOH)2N
  • Biuret: (NH2)CO)2 NH

Cyanic acid hydrolyses to ammonia and carbon dioxide in water. The salts and esters of cyanic acid are cyanates. But esters of normal cyanic acid are not known. The salts and esters of isocyanic acid are isocyanates. The isocyanate group reacts with the hydroxyl functional group to form a urethane linkage. Diisocyanates (or polyisocyanates) are monomers for polyurethane production. Polyurethane is made from a variety of diisocyanates in conjunction with polyether and polyester polyols as co-reactants by addition polymerization which needs at least two -N=C=O groups. Polyurethanes are widely used in the manufacture of flexible and rigid foams, fibres, coatings, and elastomers. If isocyanate monomer is polymerized with amine group, polyurea is produced. Cyanates (or Isocyanates) are readily reacts with various form of amine (including ammonia, primary-, secondary-amines, amides and ureas) and hydroxyl functional group. They are used in the synthesis for the target molecules such as pharmaceuticals, pesticides, textile softener, lubricants and industrial disinfectants. They can convert to polycyclic compounds such as hydantoins and imidazolons. They are used as plastic additives and as heat treatment salt formulations for metals.

SALES SPECIFICATION

APPEARANCE

clear liquid
ASSAY 98.0% min
SPECIFIC GRAVITY 0.880 - 0.890
TRANSPORTATION
PACKING 180kgs in drum
HAZARD CLASS 6.1 (Packing Group: I)
UN NO. 2485
OTHER INFORMATION
Hazard Symbols: F T+, Risk Phrases: 11-14-26-34-37-42, Safety Phrases: 23.2-26-36/37/39-45