Alizarine Yellow R

Alizarine Yellow R

Alizarin Yellow R (sodium salt)
Alizarin Yellow R (acid)
Names
IUPAC name Sodium 2-hydroxy-5-[(E)-(4-nitrophenyl)diazenyl]benzoate
Other names 5-[(p-Nitrophenyl)azo]salicylic acid sodium salt Chrome orange Mordant orange 1 C.I. 14030
Identifiers
CAS Number	1718-34-9 (Na salt) Y 2243-76-7 (acid) [1]  Y
3D model (JSmol)	Interactive image
ChemSpider	17215762  Y
ECHA InfoCard	100.017.109
EC Number	209-536-1
PubChem CID	6504724  (Na salt)
UNII	R1T3O0G585  (Na salt) Y OBF2VZO457  (acid) Y
CompTox Dashboard (EPA)	DTXSID1033163
InChI InChI=1S/C13H9N3O5.Na/c17-12-6-3-9(7-11(12)13(18)19)15-14-8-1-4-10(5-2-8)16(20)21;/h1-7,17H,(H,18,19);/q;+1/p-1/b15-14+; Y Key: HXKKTXMJSVFQSL-WPDLWGESSA-M Y InChI=1/C13H9N3O5.Na/c17-12-6-3-9(7-11(12)13(18)19)15-14-8-1-4-10(5-2-8)16(20)21;/h1-7,17H,(H,18,19);/q;+1/p-1/b15-14+; Key: HXKKTXMJSVFQSL-QUIZLSBABP
SMILES [Na+].O=C([O-])c1cc(ccc1O)/N=N/c2ccc(cc2)[N+]([O-])=O
Properties
Chemical formula	C13H8N3NaO5 (Na salt) C13H9N3O5 (acid)
Molar mass	309.21 g mol−1 (Na salt) 287.23 g mol−1 (acid)
HazardsSigma-Aldrich Co., ALIZARINE YELLOW R. Retrieved on 09 April 2023.
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H319
Precautionary statements	P264, P270, P280, P301+P312, P305+P351+P338, P330, P337+P313, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N  verify  (what is  YN ?) Infobox references

Alizarine Yellow R(pH indicator)
below pH 10.1		above pH 12.0
10.1	⇌	12.0

Alizarine Yellow R is a yellow colored azo dye made by the diazo coupling reaction. It is usually commercially available as a sodium salt. In its pure form, it is a rust-colored solid. ^[2] It is mainly used as a pH indicator.

Preparation

Alizarine Yellow R is produced by azo coupling of salicylic acid and diazonium derivative of 4-Nitroaniline

References

1. Lide, David R. (25 June 2007). CRC Handbook of Chemistry and Physics, 88th Edition . CRC Press. pp.  3–10. ISBN   9780849304880. OCLC   1024315229.
2. "Safety Datasheet (MSDS) for alizarin yellow R". Department of Chemistry, University of Oxford. 2005. Archived from the original on 19 March 2011. Retrieved 11 October 2008.

External links

• Alizarin Yellow R at Sigma Aldrich