Sigma-Aldrich
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Stains & Dyes



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Quinaldine Red Dye content 95 % 117-92-0201316pricing
Quinoline Yellow Dye content 95 % 8003-22-3234133pricing
Quinoline Yellow Mixture of the di- and trisulfonic acids of Quinoline Yellow 8004-92-0309052pricing
Quinoline Yellow Standard Fluka, for microscopy (Hist.), mixture of di- and trisulfonic acid sodium salt 8004-92-0Analytical, Microscopy, Standard22680pricing
RH 421 ≥95%, solid 107610-19-5R8026pricing
RIM-1 ≥90% (HPLC) R8151pricing
Reactive Black 5 Dye content 55 % 17095-24-8306452pricing
Reactive Blue 4 Dye content 35 % 13324-20-4244813pricing
 Reactive Brown 10 practical grade 12225-67-1PracticalR0385pricing
 Reactive Green 19–Dextran R5745pricing
 Reactive Green 19 practical grade 61931-49-5PracticalR9378pricing
 Reactive Green 5 12225-74-0R9253pricing
Reactive Orange 16 Dye content 50 % 12225-83-1306509pricing
 Reactive Red 4-Dextran R4129pricing
Reactive Red 120 61951-82-4R0378pricing
 Reactive Yellow 81−Polyethylene glycol 8000 conjugate R4388pricing
Reichardt’s dye Dye content 90 % 10081-39-7272442pricing
Reinecke salt 13573-16-5R4126pricing
Remazol Brilliant Blue R 2580-78-1R8001pricing
Remazol Brilliant Violet 5R 12226-38-9R6006pricing
 Renin Substrate 1 R8276pricing
Resazurin sodium salt certified by the Biological Stain Commission 62758-13-8Certified by the Biological Stain Commission199303pricing
Resorcinol SigmaUltra, ≥99% 108-46-3SigmaUltraR5645pricing
Resorufin Dye content 95 % 635-78-9424455pricing
Resorufin sodium salt Dye content 75 % 34994-50-8230154pricing
Rhod 2 triammonium salt ~90% 129787-65-1R3384pricing
Rhodamine 110 chloride Dye content 75 % 13558-31-1432202pricing
Rhodamine 123 62669-70-9R8004pricing
Rhodamine 6G Dye content 99 % 989-38-8252433pricing
Rhodamine 6G Dye content ~95 % 989-38-8R4127pricing
Rhodamine 6G perchlorate Dye content 99 % 13161-28-9252441pricing
Rhodamine B Dye content 90 % 81-88-9252425pricing
Rhodamine B Dye content ~95 % 81-88-9R6626pricing
Rhodamine B base Dye content 97 % 509-34-2234141pricing
Rhodamine B isothiocyanate mixed isomers 36877-69-7283924pricing
 Rhodamine B isothiocyanate–Dextran average mol wt ~10,000 R8881pricing
 Rhodamine B isothiocyanate–Dextran average mol wt ~40,000 R9131pricing
Rhodamine B isothiocyanate-Celite® Mixed isomers suitable for protein labeling ProteomicsR5505pricing
Rhodanile Blue A complex of Nile Blue and Rhodamine B., Dye content 75 % 14969-56-3121495pricing
Rose Bengal diacetate 61738-01-0R8401pricing
Rose Bengal lactone 95% 4159-77-7328960pricing
Rose Bengal sodium salt Dye content ~90 % 632-69-9R3877pricing
Rose Bengal sodium salt certified by the Biological Stain Commission 632-69-9R4507pricing
Rose bengal Dye content 95 % 632-69-9330000pricing
Rose bengal bis(triethylammonium) salt Dye content 90 % 91491-51-9305278pricing
Rubrene powder 517-51-1R2206pricing
Ruthenium Red Standard Fluka, for microscopy, ≥85% (calc. on dry substance, AT) 11103-72-3Analytical, Microscopy, Standard84071pricing
Ruthenium Red Technical grade 11103-72-3R2751pricing
Rutin hydrate 95% 207671-50-9R2303pricing
p-Rosolic acid Dye content 85 % 603-45-2861324pricing