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1260-17-9

1260-17-9 structural image
Product Name: Carminic Acid
Formula: C22H20O13
Synonyms: Carminic acid (C.I. 75470);Natural Red 4
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Carminic acid appears as dark purplish-brown mass or bright red or dark red powder. Darkens at 248 °F. Deep red color in water. Yellow to violet in acidic aqueous solutions. (NTP, 1992)
Color/Form Red monoclinic prisms from aqueous methanol
Melting Point Decomposes at 277 °F (NTP, 1992)
Solubility less than 1 mg/mL at 70 °F (NTP, 1992)
Optical Rotation Specific optical rotation (water): +51.6 deg at 15 °C/654 angstroms
pH pH = 4.8 (yellow); pH = 6.2 (violet)
Dissociation Constants pKa1 = 2.81; pKa2 = 5.43; pKa3 = 8.10
Other Experimental Properties Bright-red, light pieces, easily reduced to powder; practically insoluble in cold water or dil acid; partly soluble in hot water; soluble in borax, alkali hydroxides and alkali carbonates giving deep red solutions /Aluminum calcium lake/
Chemical Classes Dyes -> Anthraquinone Dyes

COMPUTED DESCRIPTORS

Molecular Weight 492.4 g/mol
XLogP3 0.5
Hydrogen Bond Donor Count 9
Hydrogen Bond Acceptor Count 13
Rotatable Bond Count 3
Exact Mass 492.09039069 g/mol
Monoisotopic Mass 492.09039069 g/mol
Topological Polar Surface Area 243 Ų
Heavy Atom Count 35
Formal Charge 0
Complexity 864
Isotope Atom Count 0
Defined Atom Stereocenter Count 5
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Carminic acid appears as dark purplish-brown mass or bright red or dark red powder. Darkens at 248 °F. Deep red color in water. Yellow to violet in acidic aqueous solutions. (NTP, 1992)

RELATED SUPPLIERS

Vinayak Ingredients (INDIA) Pvt. Ltd.

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product:1260-17-9 / 1343-78-8 Carminic acid 98%
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