Synthetic Dyes - Suppliers, Manufacturers, Exporters


Acid Blue FCF

Acid Blue 9 C.I. No. 42090 CAS No. 2650-18-2 Molecular Formula : C37H34N2Na2O9S3 Molecular Weight : 792.85 Shade: Bright Greenish Blue Type of Dye : Acid Dye Chemical Class : Triphenylmethane Description : Bluish Powder Hue : Bright Greenish Blue Solubility gpl at RT : 200 ? 225 Insoulubles % : 0.1- 0.2 pH of 2.0 % Soln : 6.0 - 7.0 Strength - Reflectance : 100 +/ - 2 % dE : 0.5 +/ - 0.2 Wavelength of Max. Absorption nm : 630 Foaming : Nil Dusting Property : Dedusted Moisturer content % : 6-May Heavy Metals -- Lead ppm : < 10 Arsenic ppm : < 03 Chromium ppm : <10 Manganese ppm : <50 Dischargeability : Good Uses ---- Dyeing of Textiles : Wool, Silk Non- Textiles : Paper, Wood Stain, pond dyes

Allura Red AC Dye

Allura Red AC Dye is a red azo dye. It is used as a food dye and has the E number E129. Allura Red AC was originally introduced in the United States.It has the appearance of a dark red powder. Allura Red AC usually comes as a sodium salt, but can also be used as both calcium and potassium salts. It is soluble in water; in solution, its maximum absorbance lies at about 504 nm.Allura Red AC has fewer health risks associated with it in comparison to other azo dyes.

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Amaranth is a dark red to purple azo dye used as a food dye and to color cosmetics. The name was taken from amaranth grain, a plant distinguished by its red color and edible protein-rich seeds. Amaranth is an anionic dye. It can be applied to natural and synthetic fibers, leather, paper, and phenol-formaldehyde resins. As a food additive it has E number E123. Amaranth usually comes as a trisodium salt. It has the appearance of reddish-brown, dark red to purple water-soluble powder that decomposes at 120 °C without melting. Amaranths water solution has absorption maximum at about 520 nm.

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Brilliant Blue

Brilliant Blue is a synthetic food colorant (aka artificial color) with a greenish-blue hue used to color beverages, dairy powders, jellies, candies, condiments, icings, syrups, extracts, and many drugs and cosmetics. Brilliant Blue is also used to color paper or paper board that comes into contact with foods. It is often used together with FD&C Yellow No. 5 to make green food coloring. Brilliant Blue is manufactured by a condensation reaction of benzaldehyde-o-sulfonic acid and α-(N-ethylanilino)-m-toluenesulfonic acid. Brilliant Blue is very soluble in water, glycerol, and glycol, and slightly soluble in ethanol. Brilliant Blue is stable in a wide range of pH.

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Carmoisine is a synthetic red food dye from the azo dye group. It usually comes as a disodium salt. Carmoisine is a red to maroon powder. It is used for the purposes where the food is heat-treated after fermentation.

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Disperse Blue 301 Industrial Grade

Alfa Chemistry offers an extensive catalog of building blocks, reagents, catalysts, reference materials, and research chemicals in a wide range of applications. We supply Disperse Blue 301 (CAS:105635-65-2). More information please visit the website:


Erythrosine, also known as Red No. 3, is an organoiodine compound, specifically a derivative of fluorone. It is cherry-pink synthetic, primarily used for food coloring. Erythrosine is the disodium salt of 2,4,5,7-tetraiodofluorescein. Its maximum absorbance is at 530 nm in an aqueous solution, and it is subject to photodegradation.Erythrosine used as a printing inks, biological stain,dental plaque disclosing agent,sensitizer for orthochromatic photographic films.Erythrosine is commonly used in sweets such as some candies and popsicles, and even more widely used in cake-decorating gels. It is also used to color pistachio shells.

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Giemsa's Stain A.C.S. Above 90%



CAS No                      :           51811 - 82 – 6


Appearance               :           Dark green powder  


Structure                    :


Batch No                    :           GS – 08/37

Mfg Date                    :           Aug -2017

Exp Date                    :           July- 2023




TEST                                                  LIMITS                                             RESULTS


Solubility 0.1% (MeOH)                    Almost clear blue solution with      Passes test

                                                            greenish fluorescence


Absorptivity 1%/ 1cm,         

at 'A max. 523.40nm                         (> 600)                                                           780

at 'A max. 647.60 nm                                    (> 950)                                                           1131   


Loss on drying at 105°C (lhr) -        (<10%)                                                            6.69% 


Suitability for Microscopy                                                                           Passes Test



Remarks :     The above sample conforms to standard specifications

alcian blue 8gx A.C.S. Above 90%


Synonyms                  :           Ingrain Blue 1

CAS NO.                    :           33864-99-2

C.I. NO.                       :           74240

Molecular Formula   :           C56H68Cl4CuN16S

Molecular Weight      :           1298.88

Appearance               :           Dark blue powder

Structure                    :



Mfg                             :           SEP : 2017

EXP                             :           AUG: 2022

BATCH NO.               :           AB1709



TESTS                                                LIMITS                                                RESULTS


Solubility                                Dark Blue Solution @ 4MG

                                                Plus 4 mL of water                            Complies


Absorption l max.                610-630                                               620

612nm in water


Dye Content:                        50-65%                                               58.20%

( by uv spectrophotometer) 

basic fuchsin A.C.S. Above 90%



Synonyms                  :           Basic Violet 14


CAS NO.                    :           632-99-5


C.I. NO.                       :           42510


Chemical Formula    :           C20H20CIN3


Molecular Weight      :           337.86gm/mole


Appearance               :           Green Crystalline Powder



BATCH NO.               :           F1802

MFG DATE                :           Feb 2018

EXP DATE                 :           Jan 2023


TESTS                                                                        LIMITS                        RESULTS


Absorption Max.                                           547nm-553nm            551.80nm


Absorptivity (A1%,1cm, In 50% EtOH)       MIN.2000                    2.281


Loss On Drying 1100C (1hr.)                       < 8 %                           4.30%                                     

Insoluble in G 4 Crucible                             0.50 % MAX.              0.10%                         


Ph (1g + 99 ml water)                                   5.00 TO 7.00               5.60                                        


Remarks :      The above sample conforms to standard specifications