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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691399 Chlorosulfonyl isocyanate Lonza quality, 99.0-100.3% (w/w) (T) CClNO3S
142662 Chlorosulfonyl isocyanate 98% 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
23040 2-Chloroethyl isocyanate technical, ≥95% (GC) C3H4ClNO
E33300 Ethyl isocyanate 98% C3H5NO
CDS019400 Isocyanato(methoxy)methane AldrichCPR C3H5NO2
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
CDS018961 1,1-dimethoxy-2-isocyanatoethane AldrichCPR C5H9NO3
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
511994 2,4,6-Tribromophenyl isocyanate 97% C7H2Br3NO
472239 2,3,4-Trifluorophenyl isocyanate 97% C7H2F3NO
CDS013437 4-bromo-1-chloro-2-isocyanatobenzene AldrichCPR C7H3BrClNO
472158 4-Bromo-2-fluorophenyl isocyanate 97% C7H3BrFNO
CDS013093 1-chloro-3-fluoro-2-isocyanatobenzene AldrichCPR C7H3ClFNO
CDS018781 2-chloro-3-fluorophenylisocyanate 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
569046 2-Fluoro-4-iodophenyl isocyanate 95% C7H3FINO
496235 4-Fluoro-2-nitrophenyl isocyanate 95% C7H3FN2O3
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
440450 3,5-Dinitrophenyl isocyanate 95% C7H3N3O5
251844 2-Bromophenyl isocyanate 97% C7H4BrNO
252298 3-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
471615 4-Chlorobenzenesulfonyl 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
487325 2-Iodophenyl isocyanate 97% C7H4INO
478679 3-Iodophenyl isocyanate 97% C7H4INO
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
78752 Phenyl isocyanate technical, ≥98.0% (GC) C7H5NO
232297 Benzenesulfonyl isocyanate 95% C7H5NO3S
477060 2-Isocyanatoethyl methacrylate contains ≤0.1% BHT as inhibitor, 98% C7H9NO3
C105198 Cyclohexyl isocyanate 98% C7H11NO
CDS016611 2-isocyanato-3-methyl-butyric acid methyl ester AldrichCPR C7H11NO3
482889 Butyl isocyanatoacetate 98% C7H11NO3
495603 Ethyl 4-isocyanatobutyrate 97% C7H11NO3
CDS000176 Methyl (2S)-2-isocyanato-4-(methylsulfanyl)butanoate AldrichCPR C7H11NO3S
414883 Hexyl isocyanate 97% C7H13NO
484946 4-Bromo-2-(trifluoromethyl)phenyl isocyanate 96% C8H3BrF3NO
511889 2-Chloro-4-(trifluoromethyl)phenyl isocyanate 98% C8H3ClF3NO
511897 2-Chloro-6-(trifluoromethyl)phenyl isocyanate 97% C8H3ClF3NO
374881 4-Chloro-3-(trifluoromethyl)phenyl isocyanate 98% C8H3ClF3NO
CDS019489 5-Chloro-2-isocyanatobenzonitrile AldrichCPR C8H3ClN2O
CDS020341 5-Fluoro-2-isocyanatobenzonitrile AldrichCPR C8H3FN2O
472182 2-Fluoro-3-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
472190 2-Fluoro-5-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
495573 3-Fluoro-5-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
472212 4-Fluoro-2-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
472220 4-Fluoro-3-(trifluoromethyl)phenyl isocyanate 97% C8H3F4NO
478504 3-Isocyanatobenzoyl chloride 95% C8H4ClNO2
375039 4-Isocyanatobenzoyl chloride 98% C8H4ClNO2
159379 2-(Trifluoromethyl)phenyl isocyanate 97% C8H4F3NO
159387 3-(Trifluoromethyl)phenyl isocyanate 97% C8H4F3NO
250821 4-(Trifluoromethyl)phenyl isocyanate 99% C8H4F3NO
487341 4-(Trifluoromethylthio)phenyl isocyanate 98% C8H4F3NOS
348376 2-(Trifluoromethoxy)phenyl isocyanate 95% C8H4F3NO2
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
487279 3,4-Dichlorobenzyl isocyanate 95% C8H5Cl2NO
487287 2-(Difluoromethoxy)phenyl isocyanate 98% C8H5F2NO2
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
512087 4-Bromo-3-methylphenyl isocyanate 98% C8H6BrNO
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
478253 3-Chloro-2-methylphenyl isocyanate 98% 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
478237 5-Chloro-2-methoxyphenyl isocyanate 98% C8H6ClNO2
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
478318 5-Fluoro-2-methylphenyl isocyanate 98% C8H6FNO
CDS004629 4-fluorobenzyl isothiocyanate AldrichCPR C8H6FNS
478180 2-Methyl-4-nitrophenyl isocyanate 98% C8H6N2O3
478334 4-Methyl-2-nitrophenyl isocyanate 95% C8H6N2O3
569178 5-Methyl-2-nitrophenyl isocyanate C8H6N2O3
512036 4-Methoxy-2-nitrophenyl isocyanate 97% C8H6N2O4
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
241601 3-Methoxyphenyl isocyanate 99% C8H7NO2
238600 4-Methoxyphenyl isocyanate 99% C8H7NO2
341770 o-Toluenesulfonyl isocyanate 95% C8H7NO3S
189278 p-Toluenesulfonyl isocyanate 96% C8H7NO3S
52650 Hexamethylene diisocyanate purum, ≥98.0% (GC) C8H12N2O2
571962 Cycloheptyl isocyanate 97% C8H13NO
571997 Cyclohexanemethyl isocyanate 97% C8H13NO
CDS008828 6-isocyanato-hexanoic acid methyl ester AldrichCPR C8H13NO3
CDS000195 Methyl (2S)-2-isocyanato-4-methylpentanoate AldrichCPR C8H13NO3
CDS001055 (R)-(-)-2-Heptyl isocyanate AldrichCPR C8H15NO
CDS000997 (S)-(+)-2-Heptyl isocyanate AldrichCPR C8H15NO
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
571849 2,4-Dichlorophenethyl isocyanate 97% C9H7Cl2NO
567906 3,4-Dichlorophenethyl isocyanate 97% C9H7Cl2NO
439932 4-Acetylphenyl isocyanate 97% C9H7NO2
439983 Methyl 2-isocyanatobenzoate 97% C9H7NO3
478997 Methyl 3-isocyanatobenzoate 97% C9H7NO3
511935 Methyl 4-isocyanatobenzoate 98% C9H7NO3
CDS000877 (S)-(-)-1-(4-Bromophenyl)ethyl isocyanate AldrichCPR C9H8BrNO
478628 4-Bromo-2,6-dimethylphenyl isocyanate 98% C9H8BrNO
569097 4-Bromo-2-ethylphenyl isocyanate 95% C9H8BrNO
CDS000811 (R)-(+)-1-(4-Chlorophenyl)ethyl isocyanate AldrichCPR C9H8ClNO
568953 2-Chloro-4,6-dimethylphenyl isocyanate 97% C9H8ClNO
571830 3-Chlorophenethyl isocyanate 97% C9H8ClNO
CDS019968 (R)-(+)-1-(4-Fluorophenyl)ethyl isocyanate AldrichCPR C9H8FNO
CDS019969 (S)-(-)-1-(4-Fluorophenyl)ethyl isocyanate AldrichCPR C9H8FNO
571814 2-Fluorophenethyl isocyanate 97% C9H8FNO
571857 4-Fluorophenethyl isocyanate 97% C9H8FNO
512044 2,3-Dimethyl-6-nitrophenyl isocyanate 97% C9H8N2O3
557021 4-Ethoxy-2-nitrophenyl isocyanate 97% C9H8N2O4
252336 2,6-Dimethylphenyl isocyanate 99% C9H9NO
496243 2-Methylbenzyl isocyanate 98% 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
478547 2-Methoxy-5-methylphenyl isocyanate 98% C9H9NO2
557072 2-Methoxybenzyl isocyanate 97% C9H9NO2
557013 3-Ethoxyphenyl isocyanate 97% C9H9NO2
557099 3-Methoxybenzyl isocyanate 97% C9H9NO2
487406 4-Methoxybenzyl isocyanate 98% C9H9NO2
CDS013116 1-isocyanato-2,3-dimethoxybenzene AldrichCPR C9H9NO3
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
CDS000904 Ethyl 2-isocyanato-4-methylvalerate AldrichCPR C9H15NO3
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
CDS017987 5-ethyl-2-isocyanatobenzonitrile AldrichCPR C10H8N2O
95755 m-Xylylene diisocyanate technical, ≥90% (GC) C10H8N2O2
511900 5-Indanyl isocyanate 97% C10H9NO
134317 trans-2-Phenylcyclopropyl isocyanate 90%, remainder predominantly cis C10H9NO
567841 3,4-Methylenedioxyphenethyl isocyanate 97% C10H9NO3
467251 Ethyl 2-isocyanatobenzoate 97% C10H9NO3
440000 Ethyl 3-isocyanatobenzoate 97% C10H9NO3
159344 Ethyl 4-isocyanatobenzoate 97% C10H9NO3
569151 Methyl 3-isocyanato-2-methylbenzoate 97% C10H9NO3
568945 3-Bromo-2,4,6-trimethylphenyl isocyanate 96% C10H10BrNO
CDS001187 (R)-(+)-1-Phenylpropyl isocyanate AldrichCPR C10H11NO
CDS000791 (S)-(-)-1-Phenylpropyl isocyanate AldrichCPR C10H11NO
478792 2-Ethyl-6-methylphenyl isocyanate 98% C10H11NO
571725 3-Phenylpropyl isocyanate 97% C10H11NO
CDS019610 (R)-(+)-1-(4-Methoxyphenyl)ethyl isocyanate AldrichCPR C10H11NO2
CDS004301 (S)-(-)-1-(3-methoxyphenyl)ethyl isocyanate AldrichCPR C10H11NO2
571822 4-Methoxyphenethyl isocyanate C10H11NO2
571784 2,4-Dimethoxybenzyl isocyanate 97% C10H11NO3
456187 3,4,5-Trimethoxyphenyl isocyanate 97% C10H11NO4
CDS000842 (R)-(-)-2-Nonyl isocyanate AldrichCPR C10H19NO
CDS000843 (S)-(+)-2-Nonyl isocyanate AldrichCPR C10H19NO
170518 1-Naphthyl isocyanate 98% C11H7NO
472514 2-Naphthyl isocyanate 97% C11H7NO
CDS006130 Dimethyl 2-isocyanatoterephthalate AldrichCPR C11H9NO5
478199 Dimethyl 5-isocyanatoisophthalate 98% C11H9NO5
567825 1-Isocyanato-1,2,3,4-tetrahydronaphthalene 97% C11H11NO
CDS002675 Ethyl (4-isocyanatophenyl)acetate AldrichCPR C11H11NO3
567876 4-Ethylphenethyl isocyanate 97% C11H13NO
572012 4-Phenylbutyl isocyanate 97% C11H13NO
569135 4-sec-Butylphenyl isocyanate 97% C11H13NO
568201 4-tert-Butylphenyl isocyanate 97% C11H13NO
567892 2,3-Dimethoxyphenethyl isocyanate 97% C11H13NO3
571873 3,4-Dimethoxyphenethyl isocyanate 97% C11H13NO3
535036 3,4,5-Trimethoxybenzyl isocyanate 97% C11H13NO4
375063 1-Adamantyl isocyanate 97% C11H15NO
CDS006379 Ethyl 4-(isocyanatomethyl)cyclohexanecarboxylate AldrichCPR C11H17NO3
CDS000410 1,6-Diisocyanato-2,2,4-trimethylhexane AldrichCPR C11H18N2O2
556270 Decyl isocyanate 98% C11H21NO
CDS014904 4-butyl-2-methylphenyl isocyanate AldrichCPR C12H15NO
569208 4-Pentylphenyl isocyanate 97% C12H15NO
478466 Undecyl isocyanate 98% C12H23NO
567795 4-Chloro-2-phenoxyphenyl isocyanate 97% C13H8ClNO2
567787 5-Chloro-2-phenoxyphenyl isocyanate 97% C13H8ClNO2
478652 4-Biphenylyl isocyanate 97% C13H9NO
495581 3-Phenoxyphenyl isocyanate 98% C13H9NO2
478970 4-Phenoxyphenyl isocyanate 98% C13H9NO2
CDS007257 p-Phenylazophenyl isocyanate AldrichCPR C13H9N3O
267864 1-(1-Naphthyl)ethyl isocyanate 95% C13H11NO
376930 2,6-Diisopropylphenyl isocyanate 98% C13H17NO
308218 2,6-Diisopropylphenyl isocyanate technical grade, 90% C13H17NO
389064 Dodecyl isocyanate 99% C13H25NO
CDS000315 3,3′-Dichloro-4,4′-diisocyanato-1,1′-biphenyl AldrichCPR C14H6Cl2N2O2
440019 4,4′-Oxybis(phenyl isocyanate) 96% C14H8N2O3
511862 9H-Fluoren-2-yl isocyanate 98% C14H9NO
511870 9H-Fluoren-9-yl isocyanate 95% C14H9NO
569089 4-Isocyanatobenzophenone 97% C14H9NO2
530824 2-Benzylphenyl isocyanate 97% C14H11NO
530832 4-Benzylphenyl isocyanate 97% C14H11NO
512001 Diphenylmethyl isocyanate 98% C14H11NO
569038 3-Isocyanato-4-methoxybiphenyl 97% C14H11NO2
487368 4-(Benzyloxy)phenyl isocyanate 98% C14H11NO2
CDS000826 (1R,2R)-(-)-2-Benzyloxycyclohexyl isocyanate AldrichCPR C14H17NO2
CDS001190 (1S,2S)-(+)-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
571768 3,3-Diphenylpropyl isocyanate 97% C16H15NO
445401 Hexadecyl isocyanate 97% C17H33NO
305405 Octadecyl isocyanate 98% C19H37NO
O1807 Octadecyl isocyanate technical grade C19H37NO