Synthetic Dyes - Suppliers, Manufacturers, Exporters



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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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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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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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

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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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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                                ACID VIOLET 19

Synonyms  : Acid Violet 19; Acid Maganta

C.I. NO.  : 42685

CAS NO.  : 3244-88-0

Molecular Formula : C20H17N3Na2O9S3

Formula Weight : 585.55

Appearance  : Green Lusterious  Powder


TESTS                          LIMITS                          RESULTS

Strength                    95 to 105                          100%      

pH                             3.00 to 6.00                        4.70



LITMUS A.C.S. Above 90%


CAS NO.  : 1393-92-6

C.I. NO.  : 42095

Formula Weight : 3300

Appearance  : Dark Blue Powder


TESTS                                    LIMITS                              RESULTS

Lambda max                        575nm in water                       590

Solubility (10 mg/ml, H2O)  Opaque dark blue solution    Passes Test

Visual Transition Interval        From pH 4.8 (red)
                                              To pH 8.3 (blue                    Passes Test

AZURE A A.C.S. Above 90%


CAS NO.  : 531-53-5


Test                                          Specification                   RESULT

Physical appearance        Greenish crystalline      powder passes test

Solubility 0.1% (dist water)  Clear Blue soltion             Passes test

Absorptivity 1%/1cm
At lambda max.626m                  1120 Min             At 628.0nm=1218
634.0nm in water  

Assay by spectrophotometry          70% Min                 76.12%

Loss on drying at 1100C (1hrs)           8% Max               3.04%


CAS NO.  : 518-67-2


Description   Dark Red To Purple   Complies
                         Colorede Powder  

Solubility   Soluble In 20                        Complies
                Parts Of Water

Identification   IR – Similar To                     Complies

Loss On Drying   NMT 5%    0.6767%

Melting Point  232 To 243 Deg.C   243 Deg C

Related Substances TLC Test Passes   Passes

Assay    NLT 95%    98.284%


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