CAS 860-22-0

Indigo carmine

Description:

Indigo carmine, also known as indigotindisulfonic acid, is a synthetic dye characterized by its deep blue color. It is commonly used in various applications, including as a food coloring agent (E132), in pharmaceuticals, and in biological staining. The chemical formula for indigo carmine is C16H8N2Na2O8S2, indicating that it contains both sodium and sulfonate groups, which enhance its solubility in water. This compound exhibits excellent stability under normal conditions, but it can degrade when exposed to strong acids or bases. Indigo carmine is known for its ability to absorb light in the visible spectrum, making it useful in colorimetric assays. Additionally, it has been utilized in medical diagnostics, particularly in procedures such as renal function tests. Safety data indicate that indigo carmine is generally regarded as safe for use in food and pharmaceuticals, although some individuals may experience allergic reactions. Overall, its vibrant color and versatility make indigo carmine a valuable compound in various fields.

Formula: C₁₆H₁₀N₂O₈S₂·2Na

InChI: InChI=1S/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17-18H,(H,21,22,23)(H,24,25,26);;

InChI key: InChIKey=BBHXOPLQIHJZNV-UHFFFAOYSA-N

SMILES: O=C1C(NC=2C1=CC(S(=O)(=O)O)=CC2)=C3C(=O)C=4C(N3)=CC=C(S(=O)(=O)O)C4.[Na]

Synonyms:

• Dinatrium-5,5'-(2-(1,3-dihydro-3-oxo-2H-indazol-2-yliden)-1,2-dihydro-3H-indol-3-on)disulfonat
• Indigotin
• Indigotine
• C.I. Food Blue 1
• 1H-Indole-5-sulfonic acid, 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-, disodium salt
• C.I. Acid Blue 74
• C.I. Acid Blue 74
• disodium 5,5-(2-(1,3-dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one)disulphonate
• 1H-Indole-5-sulfonic acid, 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-, sodium salt (1:2)
• disodium 5,5-indigodisulphonate
• 1H-indole-5-sulfonic acid, 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-, disodium salt, (2E)-
• Indigotindisulfonate Sodium [USAN]
• 5,5-Indigodisulfonic acid, disodium salt
• C.I. Food Blue 1, disodium salt
• Acid Blue 74
• Indigo-5,5-disulphonic acid disodium salt
• C.I. 75781
• E 132
• disodium (2E)-3,3'-dioxo-1,1',3,3'-tetrahydro-2,2'-biindole-5,5'-disulfonate
• C.I. Natural Blue 2
• [Δ2,2′-Biindoline]-5,5′-disulfonic acid, 3,3′-dioxo-, disodium salt

Indigo Carmine

CAS: 860-22-0

Formula: C₁₆H₈N₂Na₂O₈S₂

Purity: >95.0%(E)

Color and Shape: Dark red to Dark purple to Dark blue powder to crystal

Molecular weight: 466.35

Ref: 3B-I0214

Food Blue No. 2

CAS: 860-22-0

Formula: C₁₆H₈N₂Na₂O₈S₂

Color and Shape: Deep Blue - Deep Purple Solid

Molecular weight: 466.35

Ref: 3B-F0148

Indigo carmine

CAS: 860-22-0

Useful in the staining of Negri bodiesIndigo carmine is used as a food colorant, pH indicator and dissolved ozone indicator. It is used to detect amino fluid leaks, highlight portions of the urinary tract, tissue stains and tool for the determination of hypochlorite. As a dye in renal function, it i

Formula: C₁₆H₈N₂Na₂O₈S₂

Color and Shape: Dark blue or dark purple to black, Powder or crystalline powder

Molecular weight: 466.35

Ref: 02-A16052

Indigo carmine

CAS: 860-22-0

Formula: C16H8N2Na2O8S2

Molecular weight: 466.35

Ref: 23-131164

Indigotindisulfonate Sodium

CAS: 860-22-0

Acid dyes, whether or not premetallized, and preparations based thereon; mordant dyes & preparations based thereon

Formula: C₁₆H₈N₂Na₂O₈S₂

Color and Shape: Dark Blue Violet Solid

Molecular weight: 465.95175

Ref: 45-1339000

Sodium 3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate

CAS: 860-22-0

Formula: C₁₆H₈N₂Na₂O₈S₂

Purity: 85%

Color and Shape: Solid

Molecular weight: 466.3529

Ref: IN-DA0039KR

Indigo carmine

CAS: 860-22-0

Indigo carmine

Purity: ≥98%

Molecular weight: 466.35g/mol

Ref: 54-BUP18766

Indigo Carmine

CAS: 860-22-0

Formula: C₁₆H₈N₂O₈S₂·2Na

Molecular weight: 420.37 2*22.99

Ref: 4Z-I-073001

Indigo Carmine

CAS: 860-22-0

Indigo Carmine

Purity: 85%

Molecular weight: 466.35g/mol

Ref: 54-OR1013565

Indigotine 100 µg/mL in Acetonitrile:Water

Controlled Product

CAS: 860-22-0

Formula: C₁₆H₈N₂O₈S₂Na

Color and Shape: Colourless

Molecular weight: 466.35

Ref: 04-A14289000WL-100

Indigotine

CAS: 860-22-0

Formula: C₁₆H₈N₂O₈S₂Na

Color and Shape: Neat

Molecular weight: 466.35

Ref: 04-C14289000

Indigo Carmine (C.I. 73015)

CAS: 860-22-0

Formula: C₁₆H₈N₂Na₂O₈S₂

Purity: ≥ 85.0% (anhydrous basis)

Color and Shape: Blue to dark purple powder

Molecular weight: 466.36

Ref: 7W-GT4851

Indigo carmine

CAS: 860-22-0

Indigo carmine (NSC-8646) is an indolesulfonic acid. It is used as a dye in renal function testing for the detection of nitrates and chlorates.

Formula: C₁₆H₈N₂Na₂O₈S₂

Purity: 98.72%

Color and Shape: Dark Blue-Violet Powder Having Metallic Luster Of Copper Solid Powder

Molecular weight: 466.35

Ref: TM-T19755

Food Blue No.2 RS

CAS: 860-22-0

Color and Shape: Solid Powder Or Grains

Ref: 2K-5003000021

Blue No.2 for TLC RS

CAS: 860-22-0

Color and Shape: Purplish Dark Blue Solid Grains Or Powder

Ref: 2K-4002000021

Indigo Carmine

Controlled Product

CAS: 860-22-0

Stability Light Sensitive
Applications Indigo carmine is a dye consisting of an indigo dimer with sodium salts of sulfonic acids at positions 5 and 5'. This compound has been used as a tissue stain, pH indicator, and tool for the determination of hypochlorite in solutions.
References 1. Reinle, G.G. and Depuy, E.S. 1920. Cal State J Med. 18: 49-52. PMID: 187381042. Monson, F.C., et al. 1991. J. Urol. 145: 842-845. PMID: 20057163. Harriram, A., et al. 2003. J Environ Sci Health A Tox Hazard Subst Environ Eng. 3: 1055-1064. PMID: 127749084. Archer, T.L. 2009. J Clin Anesth. 21: 544-546. PMID: 200062695. Lee, B.E., et al. 2010. BMC Gastroenterol. 10 97. PMID: 207318306. Park, H.J., et al. 2010. J Clin Ultrasound. 38: 305-308. PMID: 20544866

Formula: C₁₆H₈N₂O₈S₂·2Na

Color and Shape: Neat

Molecular weight: 466.35

Ref: TR-I521353

Indigo Carmine

CAS: 860-22-0

Formula: C₁₆H₈N₂O₈S₂(Na)

Molecular weight: 420.4 : 2(23.0)

Ref: ST-EA-CP-I43001

Indigo Carmine ACS

CAS: 860-22-0

Formula: C₁₆H₈N₂Na₂O₈S₂

Color and Shape: Dark deep blue, Powder/granules/solid, Passes test

Molecular weight: 466.35

Ref: SR-46486

5,5’-Indigodisulfonic Acid Disodium Salt (Technical Grade)

CAS: 860-22-0

Stability Hygroscopic
Applications 5,5’-Indigodisulfonic Acid Disodium Salt is a food additive that is widely used in the market. 5,5’-Indigodisulfonic Acid Disodium Salt was also used as a dye for cationic cotton fabrics. Dyes and metabolites, Environmental Testing.
References Ma, Y.D., et al.: J. Agric. Chem., 60, 10867 (2012); Sarikaya, R., et al.: Chemosphere, 8, 974 (2012); Zhang, W., et al.: Yinran., 37, 25 (2011);

Formula: C₁₆H₈N₂O₈S₂·2Na

Purity: 85%

Color and Shape: Neat

Molecular weight: 466.35

Ref: TR-I521300