TOLUENE DIISOCYANATE

PRODUCT IDENTIFICATION
CAS NO. 584-84-9 (2,4-TDI)
91-08-7 (2,6-TDI)
26471-62-5 (Isomer mixture)

TOLUENE DIISOCYANATE
EINECS NO. 202-039-0
FORMULA CH3C6H3(NCO)2
MOL WT.

174.16

H.S. CODE

 2929.10
TOXICITY  
SYNONYMS Diisocyanatomethylbenzene; TDI; TDI 80/20;
Methyl phenylene ester Isocyanic acid; Toluylene diisocyanate; Tolylidene diisocyanate;
DERIVATION

 

CLASSIFICATION

 

GENERAL DESCRIPTION
Commercial production involves conversion of toluene to a diamine which is reacted with phosgene to yield TDI, a liquid used mainly for flexible polyurethane foams. TDI is used for the production of polyurethane foam and otherr polyurethane including elastomers, synthetic leather, coated fabrics, paints and adhesives

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE clear to pale yellow liquid, Sharp odor

MELTING POINT

 12 C
BOILING POINT 250 C
SPECIFIC GRAVITY 1.22
SOLUBILITY IN WATER Reacts
pH  
VAPOR DENSITY 6

AUTOIGNITION

 

NFPA RATINGS

 Health: 3; Flammability: 1; Reactivity: 1

REFRACTIVE INDEX

  
FLASH POINT > 110 C
STABILITY Stable under ordinary conditions

APPLICATIONS
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. The most common diisocyantes for this reaction are:

DIISOCYNATES

CAS #

EINECS #

N=C=O
FORMULA
4,4'-METHYLENEDIPHENYL DIISOCYANATE (MDI) 101-68-8 202-966-0

33.6%

 CH2(C6H4NCO)2 (250.25)

P-PHENYLENE DIISOCYANATE (PPDI)

 104-49-4 203-207-6

52.5%

 C6H4(NCO)2 (160.13)

1.6-HEXAMETHYLENE DIISOCYANATE (HDI)

 822-06-0 212-485-8

49.9%

 (CH2)6(NCO)2  (168.19)

1,5-NAPHTHALENE DIISOCYANATE (NDI)

 3173-72-6 221-641-4

39.9%

 C10H6(NCO)2 (210.19)

ISOPORON DIISOCYANATE (IPDI)

 4098-71-9 223-861-6

37.8%

 (CH3)2C6H7(CH3)CH2(NCO)2 (222.29)

TOLUENE DIISOCYANATE (TDI)

 26471-62-5 247-722-4

48.3%

 CH3C6H3(NCO)2 (174.16)
SALES SPECIFICATION

TDI 80/20

APPEARANCE

 clear to pale yellow liquid
PURITY

99.7% min
COLOR, APHA

15 max
TOTAL CHLORINE

0.1% max

MELTING POINT

12.5 ± 1 C
ACIDITY

20 - 40 ppm
ISOMER RATIO 2,4-isomer   80 +/- 1% + 2,6-isomer   20 +/- 1%

TRANSPORTATION
PACKING 240kgs in drum
HAZARD CLASS 6.1 (Packing group: II)
UN NO.

2078
OTHER INFORMATION
Hazard Symbols: T+, Risk Phrases: 26-36/37/38-40-42/43-52/53, Safety Phrases: 23-36/37-45-61