Pigment Red 21

CAS: 6410-26-0

Ref. 3D-FP40374

Product Information

• Name: Pigment Red 21
• Synonyms: 4-[(2-Chlorophenyl)azo]-3-hydroxy-N-phenyl-2-naphthalenecarboxamide, 12300, 2-Naphthalenecarboxamide, 4-[(2-chlorophenyl)azo]-3-hydroxy-N-phenyl-, 2-Naphthalenecarboxamide, 4-[2-(2-chlorophenyl)diazenyl]-3-hydroxy-N-phenyl-, 2-Naphthanilide, 4-(o-chlorophenylazo)-3-hydroxy-, 4-[(2-chlorophenyl)azo]-3-hydroxy-N-phenyl-2-Naphthalenecarboxamide(4Z)-4-[2-(2-chlorophenyl)hydrazinylidene]-3-oxo-N-phenyl-3,4-dihydronaphthalene-2-carboxamide, 4-[2-(2-Chlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthalenecarboxamide, Permanent Red FR, Pr 21, Sanyo Fast Red CR, Scarlet 3132, Sm 9811, Syton Fast Red FR, C.I. Pigment Red 21

Description

Pigment Red 21 is a primary amine that has a liquid crystal composition. It is used as a pigment in paints and plastics, and can be found in deionized water. Pigment Red 21 has a diameter of 10 nm and the structural formula C12H17N3O5. It is an inorganic pigment with chelate ligand functional groups. Pigment Red 21 is also known as Scarlet, FD&C Red No.21, or E120. This pigment absorbs radiation from the electromagnetic spectrum and converts it to heat energy, which causes its color change from red to orange when heated above its melting point of about 250 degrees Celsius. The thermal expansion coefficient for this product is approximately 4x10^-6/K at 25 degrees Celsius.

• Brand: Biosynth

Chemical properties

• Molecular weight: 401.84 g/mol
• Formula: C₂₃H₁₆ClN₃O₂
• Purity: Min. 95%
• Color/Form: Powder
• InChI: InChI=1S/C23H16ClN3O2/c24-19-12-6-7-13-20(19)26-27-21-17-11-5-4-8-15(17)14-18(22(21)28)23(29)25-16-9-2-1-3-10-16/h1-14,28H,(H,25,29)/b27-26+
• InChI key: InChIKey=XNANGTRPTFPPPE-CYYJNZCTSA-N
• SMILES: O=C(Nc1ccccc1)c1cc2ccccc2c(/N=N/c2ccccc2Cl)c1O