Carmine

Product Name: Carmine (CAS NO.1390-65-4)

Molecular Formula: C₂₂H₂₀O₁₃
Molecular Weight: 492.39g/mol
Mol File: 1390-65-4.mol
Einecs: 215-023-3
Appearance: Red powder
Boiling point: 907.6 °C at 760 mmHg
Flash Point: 316.1 °C
Density: 1.869 g/cm³
Water Solubility: Soluble in hot water
Stability: Stable. Incompatible with strong oxidizing agents.
Surface Tension: 125.6 dyne/cm
Enthalpy of Vaporization: 138.24 kJ/mol
Vapour Pressure: 1.59E-35 mmHg at 25°C
XLogP3-AA: 0.5
H-Bond Donor: 9
H-Bond Acceptor: 13
Product Categories: Anthraquinones; Biochemistry; Glucose; Glycosides; Hydroxyanthraquinones; Sugars

 Carmine (CAS NO.1390-65-4) is an edible red pigment. It is mostly used in soft capsule shell stain, it can play the role of color set.

 Carmine may be prepared from cochineal, by boiling dried insects in water to extract the carminic acid and then treating the clear solution with alum, cream of tartar, stannous chloride, or potassium hydrogen oxalate; the coloring and animal matters present in the liquid are thus precipitated. Other methods are in use in which egg white, fish glue, or gelatine are sometimes added before the precipitation.
The quality of carmine is affected by the temperature and the degree of illumination during its preparation, sunlight being requisite for the production of a brilliant hue. It also differs according to the amount of alumina present in it. It is sometimes adulterated with cinnabar, starch and other materials; from these the carmine can be separated by dissolving it in ammonia. Good carmine should crumble readily between the fingers when dry.
 Carmine lake is a pigment obtained by adding freshly precipitated alumina to decoction of cochineal.
 Carmine can be used as a staining agent in microbiology, as a Best's carmine to stain glycogen, mucicarmine to stain acidic mucopolysaccharides, and carmalum to stain cell nuclei. In these applications, it is applied together with a mordant, usually an Al(III) salt.

When heated to decomposition it emits acrid smoke and irritating fumes.
Safety Information of Carmine (CAS NO.1390-65-4):
Safety Statements: 22-24/25
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes.  

 Carmine ,its CAS NO. is 1390-65-4,the synonyms is Aluminum lake of carminic acid ; Ci 75470 ; Ci no 75470 ; Cochineal ; Carmine ; Carminate borax ; Carmine aluminum lake ; Carmine 40 .