Indigo Carmine or Acid Blue 74 or FD&C Blue No 2 or Indigotine Manufacturers Exporters

Aadhunik Industries is a manufacturing group company. Aadhunik Industries is pioneer manufacturers of Indigo Carmine or Acid Blue 74 or FD&C Blue No 2 or Indigotine, Specialty Chemicals, Pharmaceutical Excipients, Food Fragrance & Flavor chemicals in India. It has toll manufacturers and representatives in UAE, Europe, Canada & USA and agents & customers in all countries like USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Uganda, Turkey, Mexico, Brazil, Chile, Argentina, Dubai, Netherlands, Italy, Spain, Germany, Portugal, France, Malaysia, Indonesia, Thailand, Korea, Japan, Russia etc.

Aadhunik Industries and/or associated units are FDA-GMP certified, Halal and/or Kosher certified, REACH registered, ISO-9001, ISO-22000 HACCP certified. We offer crystals granules in precise micron or mesh size as per buyers needs. We offer very high purity standards as per specifications required.

General Properties and Specifications of Indigo Carmine Dye or Acid Blue 74 or FD&C Blue No. 2 or Indigotine:
Appearance: Indigo to dark blue powder.
Total colouring matters calculated as the sodium salt: 85% minimum.
Water insoluble matter: 0.2% maximum.
pH: around 7
Melting point: >300C literature. No sharp melting point.
Solubility: Soluble in water. Insoluble in organic solvents.

FD&C Blue No. 2 FCC Food Grade:
Indigotine; Indigo Carmine; CI 73015; Class: Indigoid
C16H8N2O8S2Na2 Formula weight 466.36
INS: 132 CAS: 860-22-0

DESCRIPTION
FD&C Blue No. 2 is principally the disodium salt of 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic acid, with smaller amounts of the disodium salt of 2-(1,3-dihydro-3-oxo-7-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic acid and the sodium salt of 2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic acid.
Function: Color.

REQUIREMENTS
Identification: The visible absorption spectrum of a sample of FD&C Blue No. 2 dissolved in 0.04 N aqueous ammonium acetate has a wavelength maximum of 610 nm, with an absorptivity of 0.0478 L/(mg·cm).
Arsenic (as As): Not more than 3 mg/kg.
Ether Extracts (combined): Not more than 0.4%.
Lead (as Pb): Not more than 10 mg/kg.
Mercury (as Hg): Not more than 1 mg/kg.
Subsidiary and Isomeric Colors:
Disodium Salt of 2-(1,3-Dihydro-3-oxo-7-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic Acid: Not more than 18%.
Sodium Salt of 2-(1,3-Dihydro-3-oxo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic Acid: Not more than 2%.
Total Color: Not less than 85%
Decomposition Products:
Isatin-5-sulfonic Acid Not more than 0.4%.
5-Sulfoanthranilic Acid Not more than 0.2%.
Volatile Matter (at 135°) and Chlorides and Sulfates (as sodium salts): Not more than 15% in combination.
Water-Insoluble Matter: Not more than 0.4%.

Indigotine FCC Food Grade:
CI Food Blue 1; Indigotine Disulfonate; Indigo Carmine;
CI 73015; Class: Indigoid
C16H8N2O8S2Na2 Formula weight 466.36
INS: 132 CAS: 860-22-0

DESCRIPTION
Indigotine occurs as a blue-brown to red-brown powder or granules. It dissolves in water to give a solution that is blue at neutrality, blue-violet in acid, and green to yellow-green in base. When dissolved in concentrated sulfuric acid, it yields a blue-violet solution that turns blue when diluted with water. It is insoluble in ethanol.
Function: Color.

REQUIREMENTS
Identification: A freshly prepared aqueous solution containing 20 mg of sample per liter exhibits absorbance intensities (A) and wavelength maxima as follows: at pH 7, A = 0.82 at 610 nm; at pH 1, A = 0.81 at 610 nm; and at pH 13, A = 0.2 at 610 nm, and A = 0.31 at 442 nm.
Assay: Not less than 85.0% total coloring matter.
Arsenic: Not more than 3 mg/kg.
Ether Extracts: (combined) Not more than 0.2%.
Lead: Not more than 10 mg/kg.
Loss on Drying (Volatile Matter) at 135C, Chlorides, and Sulfates (as sodium salts): Not more than 15.0% in combination.
Mercury: Not more than 1 mg/kg.
Subsidiary and Isomeric Colors:
Disodium Salt of 2-(1,3-Dihydro-3-oxo-7-sulfo-2H-indole-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic Acid: Not more than 18.0%.
Sodium Salt of 2-(1,3-Dihydro-3-oxo-2H-indole-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic Acid: Not more than 2.0%.
Uncombined Intermediates and Products of Side Reactions:
Isatin-5-sulfonic Acid Not more than 0.4%.
5-Sulfoanthranilic Acid Not more than 0.2%.
Water-Insoluble Matter: Not more than 0.4%.

CAS Number 860-22-0, Indigo Carmine or Acid Blue 74 or FD&C Blue No 2 or Indigotine manufacturers suppliers exporters at:

manufacturer supplier exporter
Aadhunik Industries
Ankleshwar Gujarat & Mumbai, India
TEL: (OFFICE) 91-22-23774610, 23723564.