Isocyanates

Isocyanates, a derivative of isocyanic acid, contain the functional group R–N=C=O, where R is predominantly an alkyl or aryl, and can include fluorinated, brominated, or chlorinated derivatives. Sigma-Aldrich offers an extensive selection of isocyanate derivatives such as aromatic isocyanates (e.g., derivatives of phenyl isocyanate), aliphatic isocyanates, and diisocyanates. Isocyanates are extremely reactive, especially toward substrates containing active hydrogen. Their reactions typically involve attack at the carbon of the isocyanate (by, for example, water or short-chain mono- or polyhydric alcohols) in a manner similar to that for carboxylic acid derivates such as esters or anhydrides. The extraordinary versatility of isocyanates and polyisocyanates has afforded them wide use in commercial manufacturing, such as in polyurethanes, which are used in making rigid and flexible foams, elastomers, coatings, and adhesives. In addition to the use of isocyanates in synthetic polymers in materials science, isocyanates are also used as synthetic building blocks.

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N-Acylbenzotriazoles

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142662 Chlorosulfonyl isocyanate 98% CClNO3S
691399 Chlorosulfonyl isocyanate Lonza quality, 99.0-100.3% (w/w) (T) CClNO3S
91095 Trichloroacetyl isocyanate purum, ≥97.0% (GC) C3Cl3NO2
217328 Trichloroacetyl isocyanate 96% C3Cl3NO2
259322 Chloroacetyl isocyanate ≥95% C3H2ClNO2
478407 Methyl isocyanatoformate 90% C3H3NO3
483397 2-Bromoethyl isocyanate ≥90% C3H4BrNO
538337 2-Chloroethyl isocyanate low HCl, 97% C3H4ClNO
E33300 Ethyl isocyanate 98% C3H5NO
243272 Allyl isocyanate 98% C4H5NO
308226 Ethyl isocyanatoformate 90%, technical grade C4H5NO3
282405 3-Chloropropyl isocyanate 96% C4H6ClNO
141070 Isopropyl isocyanate ≥98% C4H7NO
P53373 Propyl isocyanate 99% C4H7NO
252646 (Trimethylsilyl)isocyanate 85% C4H9NOSi
CDS019187 Isocyanatocyclobutane AldrichCPR C5H7NO
238627 Ethyl isocyanatoacetate 95% C5H7NO3
B95736 Butyl isocyanate 98% C5H9NO
144452 tert-Butyl isocyanate 97% C5H9NO
69006 1,4-Diisocyanatobutane technical, ≥95.0% (GC) C6H8N2O2
516589 Cyclopentyl isocyanate 97% C6H9NO
479012 Ethyl 3-isocyanatopropionate 98% C6H9NO3
CDS019970 (R)-(-)-3-Methyl-2-butyl isocyanate AldrichCPR C6H11NO
CDS019809 3-Isocyanatopentane AldrichCPR C6H11NO
389951 Pentyl isocyanate 98% C6H11NO
512079 Pentafluorophenyl isocyanate 97% C7F5NO
472131 2-Bromo-4,6-difluorophenyl isocyanate 98% C7H2BrF2NO
512052 4-Bromo-2,6-difluorophenyl isocyanate 97% C7H2BrF2NO
472239 2,3,4-Trifluorophenyl isocyanate 97% C7H2F3NO
682551 2,4,5-Trifluorophenyl isocyanate 97% C7H2F3NO
CDS013093 1-chloro-3-fluoro-2-isocyanatobenzene AldrichCPR C7H3ClFNO
569100 4-Chloro-2-fluorophenyl isocyanate 97% C7H3ClFNO
251798 2,4-Dichlorophenyl isocyanate 99% C7H3Cl2NO
251879 2,6-Dichlorophenyl isocyanate 98% C7H3Cl2NO
245607 3,4-Dichlorophenyl isocyanate 97% C7H3Cl2NO
389056 3,5-Dichlorophenyl isocyanate 96% C7H3Cl2NO
250759 2,4-Difluorophenyl isocyanate 99% C7H3F2NO
374903 2,5-Difluorophenyl isocyanate 98% C7H3F2NO
308196 2,6-Difluorophenyl isocyanate 97% C7H3F2NO
478415 3,4-Difluorophenyl isocyanate 97% C7H3F2NO
CDS016944 2,1,3-benzothiadiazol-4-yl isocyanate AldrichCPR C7H3N3OS
251844 2-Bromophenyl isocyanate 97% C7H4BrNO
241563 4-Bromophenyl isocyanate 99% C7H4BrNO
251941 2-Chlorophenyl isocyanate 98% C7H4ClNO
245682 3-Chlorophenyl isocyanate 99% C7H4ClNO
152277 4-Chlorophenyl isocyanate 98% C7H4ClNO
478598 2-Chlorobenzenesulfonyl isocyanate 90% C7H4ClNO3S
317438 4-(Chlorosulfonyl)phenyl isocyanate 97% C7H4ClNO3S
159352 2-Fluorophenyl isocyanate 97% C7H4FNO
159360 3-Fluorophenyl isocyanate 97% C7H4FNO
F14335 4-Fluorophenyl isocyanate 99% C7H4FNO
472166 4-Fluorobenzenesulfonyl isocyanate 95% C7H4FNO3S
478687 4-Iodophenyl isocyanate 97% C7H4INO
269409 2-Nitrophenyl isocyanate 95% C7H4N2O3
269417 3-Nitrophenyl isocyanate 97% C7H4N2O3
269425 4-Nitrophenyl isocyanate 97% C7H4N2O3
185353 Phenyl isocyanate ≥98% C7H5NO
232297 Benzenesulfonyl isocyanate 95% C7H5NO3S
477060 2-Isocyanatoethyl methacrylate contains ≤0.1% BHT as inhibitor, 98% C7H9NO3
C105198 Cyclohexyl isocyanate 98% C7H11NO
482889 Butyl isocyanatoacetate 98% C7H11NO3
495603 Ethyl 4-isocyanatobutyrate 97% C7H11NO3
414883 Hexyl isocyanate 97% C7H13NO
374881 4-Chloro-3-(trifluoromethyl)phenyl isocyanate 98% C8H3ClF3NO
CDS020341 5-Fluoro-2-isocyanatobenzonitrile AldrichCPR C8H3FN2O
472190 2-Fluoro-5-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
495573 3-Fluoro-5-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
472220 4-Fluoro-3-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
159379 2-(Trifluoromethyl)phenyl isocyanate 97% C8H4F3NO
159387 3-(Trifluoromethyl)phenyl isocyanate 97% C8H4F3NO
250821 4-(Trifluoromethyl)phenyl isocyanate 99% C8H4F3NO
348384 4-(Trifluoromethoxy)phenyl isocyanate 98% C8H4F3NO2
439991 3-Cyanophenyl isocyanate 97% C8H4N2O
493783 4-Cyanophenyl isocyanate 97% C8H4N2O
262242 1,4-Phenylene diisocyanate C8H4N2O2
776947 4-Bromo-2-chloro-6-methylphenyl isocyanate 97% (GC) C8H5BrClNO
478393 2,4-Dichlorobenzyl isocyanate 98% C8H5Cl2NO
487295 4-(Difluoromethoxy)phenyl isocyanate 98% C8H5F2NO2
308188 Benzoyl isocyanate technical grade, 90% C8H5NO2
511978 3,4-(Methylenedioxy)phenyl isocyanate 98% C8H5NO3
478423 Phenyl isocyanatoformate 97% C8H5NO3
511803 4-Bromobenzyl isocyanate 98% C8H6BrNO
453242 2-(Chloromethyl)phenyl isocyanate 98% C8H6ClNO
511986 2-Chloro-5-methylphenyl isocyanate 98% C8H6ClNO
487260 2-Chlorobenzyl isocyanate 97% C8H6ClNO
478245 3-Chloro-4-methylphenyl isocyanate 98% C8H6ClNO
375047 4-(Chloromethyl)phenyl isocyanate 97% C8H6ClNO
571806 4-Chlorobenzyl isocyanate 97% C8H6ClNO
478261 5-Chloro-2-methylphenyl isocyanate 98% C8H6ClNO
487317 2-Fluoro-5-methylphenyl isocyanate 98% C8H6FNO
516546 2-Fluorobenzyl isocyanate 97% C8H6FNO
709115 3-Fluoro-2-methylphenyl isocyanate 97% C8H6FNO
516554 3-Fluorobenzyl isocyanate 98% C8H6FNO
559733 4-Fluoro-3-methylphenyl isocyanate 98% C8H6FNO
487309 4-Fluorobenzyl isocyanate 98% C8H6FNO
227269 Benzyl isocyanate 99% C8H7NO
143626 m-Tolyl isocyanate 99% C8H7NO
T40703 o-Tolyl isocyanate ≥99% C8H7NO
143634 p-Tolyl isocyanate 99% C8H7NO
241598 2-Methoxyphenyl isocyanate 99% C8H7NO2
238600 4-Methoxyphenyl isocyanate 99% C8H7NO2
189278 p-Toluenesulfonyl isocyanate 96% C8H7NO3S
52650 Hexamethylene diisocyanate purum, ≥98.0% (GC) C8H12N2O2
571962 Cycloheptyl isocyanate 97% C8H13NO
571997 Cyclohexanemethyl isocyanate 97% C8H13NO
389943 Heptyl isocyanate 97% C8H15NO
374857 3,5-Bis(trifluoromethyl)phenyl isocyanate 98% C9H3F6NO
CDS017996 2-isocyanato-5-methylbenzonitrile AldrichCPR C9H6N2O
569070 4-Isocyanatobenzyl cyanide 97% C9H6N2O
216836 Tolylene-2,4-diisocyanate technical grade, 80% C9H6N2O2
439932 4-Acetylphenyl isocyanate 97% C9H7NO2
439983 Methyl 2-isocyanatobenzoate 97% C9H7NO3
478997 Methyl 3-isocyanatobenzoate 97% C9H7NO3
511935 Methyl 4-isocyanatobenzoate 98% C9H7NO3
478628 4-Bromo-2,6-dimethylphenyl isocyanate 98% C9H8BrNO
569097 4-Bromo-2-ethylphenyl isocyanate 95% C9H8BrNO
CDS019968 (R)-(+)-1-(4-Fluorophenyl)ethyl isocyanate AldrichCPR C9H8FNO
CDS019969 (S)-(-)-1-(4-Fluorophenyl)ethyl isocyanate AldrichCPR C9H8FNO
571857 4-Fluorophenethyl isocyanate 97% C9H8FNO
478660 2,5-Dimethylphenyl isocyanate 98% C9H9NO
252336 2,6-Dimethylphenyl isocyanate 99% C9H9NO
390100 3,5-Dimethylphenyl isocyanate 99% C9H9NO
487414 3-Methylbenzyl isocyanate 98% C9H9NO
478555 4-Ethylphenyl isocyanate 98% C9H9NO
487422 4-Methylbenzyl isocyanate 97% C9H9NO
456179 Phenethyl isocyanate 98% C9H9NO
557099 3-Methoxybenzyl isocyanate 97% C9H9NO2
487406 4-Methoxybenzyl isocyanate 98% C9H9NO2
251887 2,4-Dimethoxyphenyl isocyanate 97% C9H9NO3
251895 2,5-Dimethoxyphenyl isocyanate 97% C9H9NO3
511919 3,4-Dimethoxyphenyl isocyanate 98% C9H9NO3
478164 3,5-Dimethoxyphenyl isocyanate 98% C9H9NO3
487384 4-(Dimethylamino)phenyl isocyanate 97% C9H10N2O
495611 Ethyl 6-isocyanatohexanoate 98% C9H15NO3
CDS001056 (R)-(-)-2-Octyl isocyanate AldrichCPR C9H17NO
CDS001057 (S)-(+)-2-Octyl isocyanate AldrichCPR C9H17NO
428345 1,1,3,3-Tetramethylbutyl isocyanate 98% C9H17NO
571741 2-Ethylhexyl isocyanate 98% C9H17NO
329746 Octyl isocyanate 97% C9H17NO
95755 m-Xylylene diisocyanate technical, ≥90% (GC) C10H8N2O2
511900 5-Indanyl isocyanate 97% C10H9NO
134317 trans-2-Phenylcyclopropyl isocyanate 90%, remainder predominantly cis C10H9NO
159344 Ethyl 4-isocyanatobenzoate 97% C10H9NO3
CDS001187 (R)-(+)-1-Phenylpropyl isocyanate AldrichCPR C10H11NO
571725 3-Phenylpropyl isocyanate 97% C10H11NO
CDS019610 (R)-(+)-1-(4-Methoxyphenyl)ethyl isocyanate AldrichCPR C10H11NO2
571784 2,4-Dimethoxybenzyl isocyanate 96% C10H11NO3
170518 1-Naphthyl isocyanate 98% C11H7NO
472514 2-Naphthyl isocyanate 97% C11H7NO
567825 1-Isocyanato-1,2,3,4-tetrahydronaphthalene 97% C11H11NO
572012 4-Phenylbutyl isocyanate 97% C11H13NO
568201 4-tert-Butylphenyl isocyanate 97% C11H13NO
567892 2,3-Dimethoxyphenethyl isocyanate 97% C11H13NO3
375063 1-Adamantyl isocyanate 97% C11H15NO
CDS000410 1,6-Diisocyanato-2,2,4-trimethylhexane AldrichCPR C11H18N2O2
556270 Decyl isocyanate 98% C11H21NO
478466 Undecyl isocyanate 98% C12H23NO
478652 4-Biphenylyl isocyanate 97% C13H9NO
495581 3-Phenoxyphenyl isocyanate 98% C13H9NO2
376930 2,6-Diisopropylphenyl isocyanate 97% C13H17NO
389064 Dodecyl isocyanate 99% C13H25NO
511862 9H-Fluoren-2-yl isocyanate 98% C14H9NO
511870 9H-Fluoren-9-yl isocyanate 95% C14H9NO
530832 4-Benzylphenyl isocyanate 97% C14H11NO
487368 4-(Benzyloxy)phenyl isocyanate 98% C14H11NO2
CDS000826 (1R,2R)-(-)-2-Benzyloxycyclohexyl isocyanate AldrichCPR C14H17NO2
571865 2,2-Diphenylethyl isocyanate 97% C15H13NO
567949 2-(4-Biphenyl)ethyl isocyanate 97% C15H13NO
483443 Tetradecyl isocyanate 97% C15H29NO
707422 N-Fmoc-isocyanate 95% C16H11NO3
445401 Hexadecyl isocyanate 97% C17H33NO
O1807 Octadecyl isocyanate technical grade C19H37NO
305405 Octadecyl isocyanate ≥90% C19H37NO