TROPAEOLIN O

PRODUCT IDENTIFICATION

 

11.1 - 12.7

 
CAS NO. 547-57-9

TROPAEOLIN O

EINECS NO. 208-924-8
FORMULA C12H9N2NaO5S
MOL WT. 316.27
H.S. CODE 3204.12.5090
CLASSIFICATION

Acid Dye, pH Indicato
Stain, Coloring Agent

SYNONYMS Acid orange 6; CI 14270; Resorcin Yellow; Resorcinol Yellow;
4-((2,4-Dihydroxyphenyl)azo)benzenesulfonic acid sodium salt; Tropaeolin O sodium salt; Sodium azoresorcinolsulfanilate;Tropaeolene; Tropaeolin R; Tropaeoline; Yellow T; Resorcin Yellow; Resorcinol Yellow; Sodium 4-(2,4-dihydroxyphenylazo)benzenesulphonate; 2,4-Dihydroxyazobenzene-4'-sulfonate sodium salt; C.I. Acid Orange 6; C.I. Food Yellow 8; Chrysoin G; Chrysoine resorcinol; p-(2,4-dihydroxyphenylazo)benzenesulfonate); Chrysoin S; Chrysoine S; Sodium
SMILES

c1(\N=N\c2c(cc(O)cc2)O)ccc(S(=O)(=O)[O-])cc1.[Na+]

EXTRA NOTES

Other RN: 111886-17-0

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE orange to dark brown powder
MELTING POINT  
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER 4 - 5 g/l at room temperature, 200 g/l at 100C
SOLUBILITY soluble in alcohol
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS  

REFRACTIVE INDEX

  
FLASH POINT

 

STABILITY Stable under ordinary conditions

EXTERNAL LINKS & GENERAL DESCRIPTION

USA.gov - Tropaeolin O

Wikipedia Linking - Chrysoine resorcinol

Google Scholar Search - Tropaeolin O

Drug Information Portal (U.S. National Library of Medicine) - Tropaeolin O

PubChem Compound Summary - Tropaeolin O

IPCS INCHEM -  WHO FOOD ADDITIVES SERIES NO. 12

KEGG (Kyoto Encyclopedia of Genes and Genomes) -  Tropaeolin O

http://www.ncbi.nlm.nih.gov/ -  Tropaeolin O

Material Safety Data Sheet - Tropaeolin O

EPA - Substance Registry Services - Tropaeolin O

Local:
Acid dyes are water-soluble dyes employed mostly in the form of sodium salts of the sulfonic or carboxylic acids. They are anionic which attach strongly to cationic groups in the fibre directly. They can be applicable to all kind of natural fibres like wool, cotton and silk as well as to synthetics like polyesters, acrylic and rayon. But they are not substantive to cellulosic fibres. They are also used in paints, inks, plastics and leather. Orange acid azo dyes produce an orange-pink color. They are used in coloring foods and drugs and as intermediates for making photosensive dyes and drugs. They are used  as counter stains in histology and cytology and as components of Mallory's acid fuchsin. Acid Fuchsin (acid magenta) is a various mixture of sulfonated fuchsins. There are four of these compounds which have three sulfonic groups each. It is used in Andrade's indicator and in various complex stains to demonstrate collagen fibres red and in smooth muscle in contrast to collagen. It is used as a pH indicator.

Examples of orange acid dyes

  • Ethyl orange Sodium salt ( CAS RN: 62758-12-7)
  • Orange II ( CAS RN: 633-96-5)
  • Orange III (methyl orange, CAS RN: 547-58-0)
  • Orange IV  (CAS RN: 554-73-4)
  • Orange G ( CAS RN: 1936-15-8)
  • Tropaeolin O (CAS RN: 547-57-9)
  • Victoria orange
  • Acid Orange II (Dibromofluorescein, 596-03-2)

Tropaeolin O is called chrysoine resorcinol when used as a food additive (E number E103) and called tropaeolene as a biological stain. Tropaeolin O is used as a pH indicator from pH 11.1 (yellow) to pH 12.7 (orange).

SALES SPECIFICATION

APPEARANCE

 orange to dark brown powder
TRANSITION pPH RANGE

11.1 (yellow)
12.7 (orange).

MOISTURE

5.0% max

RESIDUE ON IGNITION 22.0 - 26.0 %
TRANSPORTATION
PACKING  
HAZARD CLASS  
UN NO.

 

SAFETY INFORMATION

HAZARD OVERVIEW

Not a dangerous substance according to GHS. Eyes: May cause eye irritation. Skin: May be harmful if absorbed through skin. May cause skin irritation. Inhalation: May be harmful if inhaled. May cause respiratory tract irritation. Ingestion: May be harmful if swallowed.

HAZARD CODES

 

RISK PHRASES

 

SAFETY PHRASES