Home > Name List By 2 > 2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[2-(2,4,5-trimethylphenyl)diazenyl]-, sodium salt (1:2)

CAS No 3564-09-8 , 2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[2-(2,4,5-trimethylphenyl)diazenyl]-, sodium salt (1:2)

  • Name: 2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[2-(2,4,5-trimethylphenyl)diazenyl]-, sodium salt (1:2)
  • Synonyms: Japan Red 502; FD and C Red No. 1;C Red No. 1;2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[2-(2,4,5-trimethylphenyl)diazenyl]-, sodium salt (1:2); Ext D and C Red No. 15; Ponceau3R sodium salt;2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[(2,4,5-trimethylphenyl)azo]-, disodium salt (9CI); Usacert Red No. 1; Disodium3-hydroxy-4-[(2,4,5-trimethylphenyl)azo]-2,7-naphthalenedisulfonate; Ponceau 3RN; Ponceau 3R Lake; FD& Japan Red 1; Ponceau3R (6CI); C.I. 16155; Scarlet F; Maple Ponceau 3R; DolkwalPonceau 3R; FDCRed 1; D and C Red 15;
  • CAS Registry Number:
  • Flash Point: °C
  • Boiling Point: °Cat760mmHg
  • Density: g/cm3
  • Safety Statements: Confirmed carcinogen with experimental carcinogenic and tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx and SOx.
  • Hazard Symbols: Prohibited by FDA for use in foods, drugs, cosmetics.
  • Flash Point: °C
  • EINECS: 222-638-0
  • Molecular Weight: 494.45
  • InChI: InChI=1/C19H18N2O7S2.2Na/c1-10-6-12(3)16(7-11(10)2)20-21-18-15-5-4-14(29(23,24)25)8-13(15)9-17(19(18)22)30(26,27)28;;/h4-9,20H,1-3H3,(H,23,24,25)(H,26,27,28);;/q;2*+1/p-2/b21-18+;;
  • Risk Statements: 20/21/22
  • Molecular Formula: C19H16N2Na2O7S2
  • Molecular Structure:CAS No:3564-09-8 2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[2-(2,4,5-trimethylphenyl)diazenyl]-, sodium salt (1:2)

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References of 2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[2-(2,4,5-trimethylphenyl)diazenyl]-, sodium salt (1:2)
Title: Ponceau 3R
CAS Registry Number: 3564-09-8
CAS Name: 3-Hydroxy-4-[(2,4,5-trimethylphenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt
Synonyms: sodium cumeneazo-b-naphthol disulfonate; C.I. Food Red 6; C.I. 16155; FD & C Red no. 1; Ext. D & C Red no. 15
Molecular Formula: C19H16N2Na2O7S2
Molecular Weight: 494.45
Percent Composition: C 46.15%, H 3.26%, N 5.67%, Na 9.30%, O 22.65%, S 12.97%
Literature References: Prepn: Colour Index vol. 4 (3rd ed., 1971) p 4092. Toxicity studies: Hansen et al., Toxicol. Appl. Pharmacol. 5, 105 (1963).
Properties: Dark red powder. Soluble in water with cherry-red color, slightly in alcohol. Addition of HCl to its aq soln does not change the color, but NaOH produces a yellow ppt. It dissolves in concd H2SO4 to a cherry-red soln which does not change color on dilution.
Use: Dyeing wool. Colorant in food, drugs and cosmetics.