Indigo carmine

Basic Information

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CAS Number

860-22-0

Molecular Formula

C16H8N2Na2O8S2

Molecular Weight

466.35 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Basic Chemical Raw Materials Organic Chemicals Ketones

Basic Chemical Raw Materials Organic Chemicals Heterocyclic Compounds

Pharmaceutical Chemicals Pharmaceutical Intermediates Heterocyclic Intermediates

Fine Chemicals Dyes and Pigments Organic Dyes

Fine Chemicals Surfactants Anionic Surfactants

Laboratory Chemicals Research Chemicals Biochemical Reagents

Basic Physical Properties

Melting Point

>300°C

Boiling Point

No data available

Density

1.01 g/mL at 20 °C

Water Solubility

1 g/100 mL (25 ºC)

Solubility

1g/l

Refractive Index

n20/D 1.335

SMILES

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O=S(C1=CC2=C(N/C(C2=O)=C3NC4=C(C=C(S(=O)([O-])=O)C=C4)C/3=O)C=C1)([O-])=O.[Na+].[Na+]

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;;/h1-6,17,19H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2

InChIKey

JFVXEJADITYJHK-UHFFFAOYSA-L

LogP

3.06060

Complexity

877

Safety Information

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GHS Hazard Pictograms

H302

Hazard Statement

H302 Harmful if swallowed
Acute toxicity, oral

Stability

Stable. Incompatible with strong oxidizing agents.

Sensitiveness

Light Sensitive

Synonyms & References

English

Sodium 3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate
5,5-Indigodisulfonic acid, disodium salt
Acid Blue 74
C.I. 73015
disodium 5,5-(2-(1,3-dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one)disulphonate
disodium 5,5-indigodisulphonate
E 132
Indigo-5,5-disulphonic acid disodium salt
Food Blue No. 2
5,5’-Indigodisulfonic Acid Disodium Salt
FD & C Blue 2
Indigo Carmine
INDIGO CARMINE, C.I. 73015
IndigoCarmine,highpuritybiologicalstain,foranalysis100GR
IndigoCarmine,highpuritybiologicalstain,foranalysis25GR
IndigoCarmine,highpuritybiologicalstain,foranalysis500GR
1311blue
acidbluew
Biological stain
CarMine blue
FD and C blue 2
Greell S
indigo carmin
Indigo carMine sodiuM salt
Indigo CarMine, for analysis, high purity biological stain
Indigo soluble
Indigotindisulfonate SodiuM
Indigotine
indigotini
l-blau2
murabba

MDL Number

MFCD00005723

Customs Code

32041200

FAQ

What is Indigo carmine (CAS: 860-22-0)?

Indigo carmine is a synthetic organic compound with the chemical formula C16H10N2O2S2Na2. It is a bright blue dye commonly used as a pH indicator and food coloring. Known for its high water solubility and stability, it is widely recognized for its applications in various industries due to its vibrant color and chemical properties.

What are the main uses of Indigo carmine (CAS: 860-22-0)?

Indigo carmine is primarily used as a pH indicator in laboratories, food coloring in the food industry, and in pharmaceuticals for tablet coatings. It also finds applications in textile dyeing, water treatment, and as a component in certain medical imaging agents. Its versatility makes it a valuable compound across multiple fields.

Is Indigo carmine (CAS: 860-22-0) safe?

Indigo carmine is generally considered safe when used within recommended limits, but it may cause allergic reactions in some individuals. It is approved by regulatory agencies such as the FDA for food use, but proper handling and protective measures should be taken during industrial or laboratory applications to ensure safety.

How should Indigo carmine ( CAS: 860-22-0 ) be stored?

Indigo carmine should be stored in a cool, dry, and dark place to maintain its stability and color integrity. It is best kept in a tightly sealed container away from moisture and light exposure. Proper storage conditions help preserve its chemical properties and ensure safe handling over time.