carmine

Also known as crimson lake, cochineal, natural red 4, red food coloring

Carmine ()also called cochineal (when it is extracted from the cochineal insect), cochineal extract, crimson lake, or carmine lake is a pigment of a bright-red color obtained from the aluminium complex derived from carminic acid. Specific code names for the pigment include natural red 4, C.I. 75470, or E120. Carmine is also a general term for a particularly deep-red color.

Chemical data

Formula: C22H20O13
Molecular weight: 492.4 g/mol
IUPAC name: 3,5,6,8-tetrahydroxy-1-methyl-9,10-dioxo-7-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]anthracene-2-carboxylic acid
SMILES: CC1=C2C(=CC(=C1C(=O)O)O)C(=O)C3=C(C2=O)C(=C(C(=C3O)O)C4C(C(C(C(O4)CO)O)O)O)O
InChIKey: DGQLVPJVXFOQEV-UHFFFAOYSA-N
XLogP: 0.5
Polar surface area: 243 Å²
H-bond donors: 9
H-bond acceptors: 13
Formal charge: 0

via PubChem

Research

4,477 papers

Indigo Carmine: Between Necessity and Concern.Journal of xenobiotics · 2023
Carmine allergy in urticaria patients.Postepy dermatologii i alergologii · 2022
Indigo carmine dye for detecting urinary track damage during vaginal surgery.European journal of obstetrics, gynecology, and reproductive biology · 2024
Carmine dye.Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology · 2000
[Asthma and allergy due to carmine dye].Anales del sistema sanitario de Navarra · 2003

via PubMed

Wikidata facts

Mass: 492.0903907
Image: Carmine.png

Show 3 more facts

Commons category: Carmine
canonical SMILES: Cc1c(C(=O)O)c(O)cc2c1C(=O)c1c(O)c(C3OC(CO)C(O)C(O)C3O)c(O)c(O)c1C2=O
chemical formula: C₂₂H₂₀O₁₃

Sources (4)

via Wikidata · CC0

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