Sigma-Aldrich
Chemistry

Chemical Synthesis
Drug Discovery
Materials Science
New Products
Nanotechnology
Biocompatible/Biodegradable
Display and Optoelectronics
Energy Source Materials
Metals and Ceramic Science
Micro and Nanoelectronics
Nanomaterials
Polymer Science
New Products
Additives
Applications
Engineering Polymers
Free Radical Initiators
Functional Polymers
Initiators
Monomers
Polymer Analysis
Specialty Areas
Key Resources
Stable Isotopes (ISOTEC)

 INITIATORS

Polymerization Tools
 
  Amine Photochemical Coinitiators
  Free Radical Initiators
  Organic Photoinitiators

Amine Photochemical Coinitiators
Amine
Product #  Product Name Add to Cart
218731 2-(Dimethylamino)ethyl benzoate 99%
437395 2-Ethylhexyl 4-(dimethylamino)benzoate 98%
455237 4-(Diethylamino)benzophenone 97%
D139475 4-(Dimethylamino)benzoin 97%
149349 4-(Dimethylamino)benzophenone 98%
160326 4,4′-Bis(diethylamino)benzophenone ≥99%
147834 Michler’s ketone 98%
214493 Chrysoidine G Dye content 90 %
406376 Isoamyl 4-(dimethylamino)benzoate,mixture of isomers 98%
Copolymerizable Amine back to top
Product #  Product Name Add to Cart
408972 2-(Diethylamino)ethyl acrylate 95%
408980 2-(Diethylamino)ethyl methacrylate 99%
330957 2-(Dimethylamino)ethyl acrylate 98%
234907 2-(Dimethylamino)ethyl methacrylate 98%
415650 3-(Dimethylamino)propyl acrylate 95%
Free Radical Initiatorsback to top
Azo 
Product #  Product Name Add to Cart
380210 1,1′-Azobis(cyclohexanecarbonitrile) 98%
440914 2,2′-Azobis(2-methylpropionamidine) dihydrochloride granular, 97%
441090 2,2′-Azobis(2-methylpropionitrile) 98%
118168 4,4′-Azobis(4-cyanovaleric acid) ≥75%
Inorganic Peroxides back to top
Product #  Product Name Add to Cart
215589 Ammonium persulfate reagent grade, 98%
163511 Hydroxymethanesulfinic acid monosodium salt dihydrate
216224 Potassium persulfate ACS reagent, ≥99.0%
216232 Sodium persulfate reagent grade, ≥98%
Miscellaneous back to top
Product #  Product Name Add to Cart
496685 2,2,6,6-Tetramethyl-1-(1-phenylethoxy)-4-piperidinol
496677 2,2,6,6-Tetramethyl-1-(1-phenylethoxy)piperidine
344796 4,4′-Trimethylenebis(1-piperidinepropionitrile) 99%
Organic Peroxides back to top
Product #  Product Name Add to Cart
531715 Dicumyl peroxide flakes, ≥99.0%
531758 1,1-Bis(tert-butylperoxy)cyclohexane solution ~80 wt. % in odorless mineral spirits
544604 2,5-Di(tert-butylperoxy)-2,5-dimethyl-3-hexyne technical grade, 90%
549215 2,5-Di(tert-butylperoxy)-2,5-dimethyl-3-hexyne blend calcium carbonate and silica ~45 wt. %
632651 Benzoyl peroxide
531758 1,1-Bis(tert-butylperoxy)cyclohexane solution ~80 wt. % in odorless mineral spirits
388149 1,1-Bis(tert-butylperoxy)cyclohexane solution 80 wt. % in benzyl butyl phthalate, technical grade
513571 1,1-Bis(tert-amylperoxy)cyclohexane solution 80 wt. % in odorless mineral spirits
479896 1,1-Bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane 92%
388084 1,1-Bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane technical grade
441694 2,2-Bis(tert-butylperoxy)butane solution 50 wt. % in mineral oil
441821 2,4-Pentanedione peroxide solution 34 wt. % in dimethyl phthalate and proprietary alcohols
513555 Luperox® 224 ~34 wt. % in 4-hydroxy-4-methyl-2-pentanone and N-methyl-2-pyrrolidone
513520 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane, blend with calcium carbonate and silica
388092 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane technical grade, 90%
513342 2-Butanone peroxide solution ~23 wt. % in 2,2,4-trimethyl-1,3-pentanediol diisobutyrate
513350 2-Butanone peroxide solution ~23 wt. % in 2,2,4-trimethyl-1,3-pentanediol diisobutyrate with red dye
513369 2-Butanone peroxide solution ~31 wt. % in 2,2,4-trimethyl-1,3-pentanediol diisobutyrate
513334 2-Butanone peroxide solution ~33 wt. % in 2,2,4-trimethyl-1,3-pentanediol diisobutyrate with red dye
513393 2-Butanone peroxide solution 22 wt. % in propylene glycol and water
495050 2-Butanone peroxide solution ~35 wt. % in 2,2,4-trimethyl-1,3-pentanediol diisobutyrate
524743 2-Butanone peroxide solution ~32 wt. % in phthalate-free plasticizer mixture with red dye
524670 2-Butanone peroxide solution ~32 wt. % in phthalate-free plasticizer mixture
273031 3-Chloroperbenzoic acid ≤77%
513431 Benzoyl peroxide, blend in dibutyl phthalate 40 wt. % in dibutyl phthalate
228877 Benzoyl peroxide 70%, remainder water
513474 Benzoyl peroxide 75%, USP, remainder water
179981 Benzoyl peroxide reagent grade, 97%
513458 Benzoyl peroxide, blend ~55% in butyl benzyl phthalate
513466 Benzoyl peroxide, blend in tricresyl phosphate ~50 wt. % in tricresyl phosphate
441716 Bis[1-(tert-butylperoxy)-1-methylethyl]benzene 96%
531693 Bis(tert-butylperoxyisopropyl)benzene,mixture of isomers ~90 wt. % in mineral filler, powder (free-flowing)
513539 1,1-Bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, blend with calcium carbonate and silica
531685 Bis(tert-butylperoxyisopropyl)benzene,mixture of isomers ≥96%
513482 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane, blend with polypropylene and silica
247502 Cumene hydroperoxide technical grade, 80%
329541 Dicumyl peroxide 98%
531731 Dicumyl peroxide ~40 wt. % in China clay, powder
531723 Dicumyl peroxide ~92 wt. % in mineral filler, powder
531715 Dicumyl peroxide flakes, ≥99.0%
513407 Di-tert-amyl peroxide 97%
513601 Ethyl 3,3-bis(tert-amylperoxy)butyrate solution 75 wt. % in odorless mineral spirits
513563 Ethyl 3,3-bis(tert-butylperoxy)butyrate solution ~75 wt. % in odorless mineral spirits
290785 Lauroyl peroxide 97%
269336 Peracetic acid solution 32 wt. % in dilute acetic acid
441465 tert-Amyl peroxybenzoate 90%
513652 tert-Amylperoxy 2-ethylhexyl carbonate 92%
416665 tert-Butyl hydroperoxide solution 5.0-6.0 M in decane
458139 tert-Butyl hydroperoxide solution 70 wt. % in H2O
513679 tert-Butyl peracetate solution 50 wt. % in aliphatic hydrocarbons
388076 tert-Butyl peracetate solution 50 wt. % in odorless mineral spirits
513628 tert-Butyl peracetate solution 75 wt. % in aliphatic hydrocarbons
168521 tert-Butyl peroxide 98%
159042 tert-Butyl peroxybenzoate 98%
513660 tert-Butylperoxy 2-ethylhexyl carbonate 95%
441473 tert-Butylperoxy isopropyl carbonate solution 75 wt. % in aliphatic hydrocarbon mixture
513644 tert-Butylperoxy isopropyl carbonate solution 75 wt. % in odorless mineral spirits
Organic Photoinitiatorsback to top
Acetophenone 
Product #  Product Name Add to Cart
405612 1-Hydroxycyclohexyl phenyl ketone 99%
227102 2,2-Diethoxyacetophenone >95%
405647 2-Benzyl-2-(dimethylamino)-4′-morpholinobutyrophenone 97%
405655 2-Hydroxy-2-methylpropiophenone 97%
410896 2-Hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone 98%
405639 2-Methyl-4′-(methylthio)-2-morpholinopropiophenone 98%
460737 3,6-Bis(2-methyl-2-morpholinopropionyl)-9-octylcarbazole 97%
328103 3′-Hydroxyacetophenone ≥99%
275719 4′-Ethoxyacetophenone 98%
278564 4′-Hydroxyacetophenone 99%
290742 4′-Phenoxyacetophenone 98%
451495 4′-tert-Butyl-2′,6′-dimethylacetophenone 98%
319856 Acetophenone-2,3,4,5,6-d5 99 atom % D
299200 Acetophenone-α-13C 99 atom % 13C
296732 Acetophenone-d8 98 atom % D
299219 Acetophenone-β-13C 99 atom % 13C
318019 Acetophenone-β,β,β-d3 98 atom % D
405663 Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide/2-hydroxy-2-methylpropiophenone, blend
Benzil/Benzoin back to top
Product #  Product Name Add to Cart
196118 2,2-Dimethoxy-2-phenylacetophenone 99%
D139475 4-(Dimethylamino)benzoin 97%
146706 4,4′-Dimethylbenzil 97%
172006 Benzoin ethyl ether 97%
195782 Benzoin isobutyl ether technical grade, 90%
479314 Benzoin methyl ether 99%
399396 Benzoin purified by sublimation, ≥99.5%
399418 Benzoin zone-refined, purified by sublimation, 99.5%
Benzophenone back to top
Product #  Product Name Add to Cart
496146 [2-(Acryloyloxy)ethyl]trimethylammonium chloride solution 80 wt. % in H2O
406236 (4-Benzoylbenzyl)trimethylammonium chloride 95%
406325 [2-(Acryloyloxy)ethyl](4-benzoylbenzyl)dimethylammonium bromide 99%
D149667 2,5-Dimethylbenzophenone technical grade, 95%
157538 2-Methylbenzophenone 98%
262463 Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride 98%, purified by sublimation
D149675 3,4-Dimethylbenzophenone 99%
220434 3-Hydroxybenzophenone 99%
198056 3-Methylbenzophenone 99%
455237 4-(Diethylamino)benzophenone 97%
149349 4-(Dimethylamino)benzophenone 98%
406244 4-(p-Tolylthio)benzophenone 97%
432768 4,4′-Bis[2-(1-propenyl)phenoxy]benzophenone, mixture of cis and trans 97%
160326 4,4′-Bis(diethylamino)benzophenone ≥99%
147834 Michler’s ketone 98%
D110507 4,4′-Dihydroxybenzophenone 99%
463329 5,5′-Methylenebis(2-hydroxy-4-methoxybenzophenone) 90%
239852 Benzophenone ReagentPlus, ≥99%
427551 Benzophenone purified by sublimation, ≥99%
405620 Benzophenone/1-hydroxycyclohexyl phenyl ketone, 50/50 blend
393983 Benzophenone-2,3,4,5,6-d5 98 atom % D
277738 Benzophenone-13C1 (carbonyl-13C) 99 atom % 13C
Cationic back to top
Product #  Product Name Add to Cart
527041 (4-Bromophenyl)diphenylsulfonium triflate
527033 (4-Chlorophenyl)diphenylsulfonium triflate
527025 (4-Fluorophenyl)diphenylsulfonium triflate
527068 (4-Iodophenyl)diphenylsulfonium triflate
526967 (4-Methoxyphenyl)diphenylsulfonium triflate
526959 (4-Methylphenyl)diphenylsulfonium triflate
527017 (4-Methylthiophenyl)methyl phenyl sulfonium triflate
526975 (4-Phenoxyphenyl)diphenylsulfonium triflate
527009 (4-Phenylthiophenyl)diphenylsulfonium triflate
527076 (4-tert-Butylphenyl)diphenylsulfonium triflate
526991 (tert-Butoxycarbonylmethoxynaphthyl)-diphenylsulfonium triflate
526983 Boc-methoxyphenyldiphenylsulfonium triflate
530964 2-(4-Methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine 98%
526932 2-Naphthyl diphenylsulfonium triflate
445835 [4-[(2-Hydroxytetradecyl)oxy]phenyl]phenyliodonium hexafluoroantimonate
531014 Bis(4-tert-butylphenyl)iodonium perfluoro-1-butanesulfonate electronic grade, ≥99%
531006 Bis(4-tert-butylphenyl)iodonium p-toluenesulfonate electronic grade, ≥99%
530999 Bis(4-tert-butylphenyl)iodonium triflate electronic grade, ≥99%
531022 Diphenyliodonium perfluoro-1-butanesulfonate electronic grade, ≥99%
530980 Diphenyliodonium p-toluenesulfonate electronic grade, ≥99%
530972 Diphenyliodonium triflate electronic grade, ≥99%
531146 Diphenyliodonium-9,10-dimethoxyanthracene-2-sulfonate electronic grade, ≥99%
531111 N-Hydroxy-5-norbornene-2,3-dicarboximide perfluoro-1-butanesulfonate electronic grade, ≥99%
531081 N-Hydroxynaphthalimide triflate electronic grade, ≥99%
531103 N-Hydroxyphthalimide triflate electronic grade, ≥99%
531138 Thiobis(triphenyl sulfonium hexafluorophosphate) solution 50 wt. % in propylene carbonate
407224 Triarylsulfonium hexafluoroantimonate salts, mixed 50% in propylene carbonate
407216 Triarylsulfonium hexafluorophosphate salts, mixed 50% in propylene carbonate
531057 Triphenylsulfonium perfluoro-1-butanesufonate electronic grade, ≥99%
526940 Triphenylsulfonium triflate
531073 Tris(4-tert-butylphenyl)sulfonium perfluoro-1-butanesulfonate electronic grade, ≥99%
531030 Tris(4-tert-butylphenyl)sulfonium triflate electronic grade, ≥99%
Miscellaneous back to top
Product #  Product Name Add to Cart
119318 Benzene-chromium(0) tricarbonyl 98%
108235 2-tert-Butylanthraquinone 98%
123242 Anthraquinone-2-sulfonic acid sodium salt 97%
124893 (±)-Camphorquinone 97%
415952 Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide 97%
156507 9,10-Phenanthrenequinone ≥99%
406392 Phenyl tribromomethyl sulfone 98%
511447 Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide 97%, powder
Thioxanthones back to top
Product #  Product Name Add to Cart
406333 [3-(3,4-Dimethyl-9-oxo-9H-thioxanthen-2-yloxy)-2-hydroxypropyl]trimethylammonium chloride 97%
425346 10-Methylphenothiazine 98%
406309 1-Chloro-4-propoxy-9H-thioxanthen-9-one 97%
406368 2,4-Diethyl-9H-thioxanthen-9-one 98%
406317 Isopropyl-9H-thioxanthen-9-one, mixture of 2- and 4-isomers 97%
Photo Acid Generator back to top
Product #  Product Name Add to Cart
548014 Diphenyliodonium hexafluorophosphate ≥98%
650706 1-Naphthyl diphenylsulfonium triflate
654027 Triarylsulfonium hexafluoroantimonate salts, mixed 50 wt. % in propylene carbonate
127396 Diphenyliodonium nitrate
407216 Triarylsulfonium hexafluorophosphate salts, mixed 50% in propylene carbonate
407224 Triarylsulfonium hexafluoroantimonate salts, mixed 50% in propylene carbonate
445835 [4-[(2-Hydroxytetradecyl)oxy]phenyl]phenyliodonium hexafluoroantimonate
526932 2-Naphthyl diphenylsulfonium triflate
526940 Triphenylsulfonium triflate
526959 (4-Methylphenyl)diphenylsulfonium triflate
526967 (4-Methoxyphenyl)diphenylsulfonium triflate
526975 (4-Phenoxyphenyl)diphenylsulfonium triflate
526983 Boc-methoxyphenyldiphenylsulfonium triflate
526991 (tert-Butoxycarbonylmethoxynaphthyl)-diphenylsulfonium triflate
527009 (4-Phenylthiophenyl)diphenylsulfonium triflate
527017 (4-Methylthiophenyl)methyl phenyl sulfonium triflate
527025 (4-Fluorophenyl)diphenylsulfonium triflate
527033 (4-Chlorophenyl)diphenylsulfonium triflate
527041 (4-Bromophenyl)diphenylsulfonium triflate
527068 (4-Iodophenyl)diphenylsulfonium triflate
527076 (4-tert-Butylphenyl)diphenylsulfonium triflate
530964 2-(4-Methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine 98%
530972 Diphenyliodonium triflate electronic grade, ≥99%
530980 Diphenyliodonium p-toluenesulfonate electronic grade, ≥99%
530999 Bis(4-tert-butylphenyl)iodonium triflate electronic grade, ≥99%
531006 Bis(4-tert-butylphenyl)iodonium p-toluenesulfonate electronic grade, ≥99%
531014 Bis(4-tert-butylphenyl)iodonium perfluoro-1-butanesulfonate electronic grade, ≥99%
531022 Diphenyliodonium perfluoro-1-butanesulfonate electronic grade, ≥99%
531030 Tris(4-tert-butylphenyl)sulfonium triflate electronic grade, ≥99%
531057 Triphenylsulfonium perfluoro-1-butanesufonate electronic grade, ≥99%
531073 Tris(4-tert-butylphenyl)sulfonium perfluoro-1-butanesulfonate electronic grade, ≥99%
531081 N-Hydroxynaphthalimide triflate electronic grade, ≥99%
531103 N-Hydroxyphthalimide triflate electronic grade, ≥99%
531111 N-Hydroxy-5-norbornene-2,3-dicarboximide perfluoro-1-butanesulfonate electronic grade, ≥99%
531138 Thiobis(triphenyl sulfonium hexafluorophosphate) solution 50 wt. % in propylene carbonate
531146 Diphenyliodonium-9,10-dimethoxyanthracene-2-sulfonate electronic grade, ≥99%
Back to top