67402

Light Green SF Yellowish

analytical standard

• Synonym(s): Acid Green 5
• Linear Formula: C₃₇H₃₄N₂O₉S₃Na₂
• CAS Number: 5141-20-8
• Molecular Weight: 792.85
• Colour Index Number: 42095
• Beilstein/REAXYS Number: 5717828
• EC Number: 225-906-5
• MDL number: MFCD00012121
• UNSPSC Code: 85151701
• PubChem Substance ID: 329760576
• NACRES: NA.24

Properties

• grade: analytical standard
• Quality Level: 100
• assay: ≥97.0% (TLC)
• shelf life: limited shelf life, expiry date on the label
• impurities: ≤4.0% water
• mp: 288 °C (dec.) (lit.)
• application(s): cleaning products; cosmetics; food and beverages; personal care
• format: neat
• SMILES string: [Na+].[Na+].CCN(Cc1cccc(c1)S([O-])(=O)=O)c2ccc(cc2)\C(=C3\C=CC(\C=C3)=[N+](/CC)Cc4cccc(c4)S([O-])(=O)=O)c5ccc(cc5)S([O-])(=O)=O
• InChI: 1S/C37H36N2O9S3.2Na/c1-3-38(25-27-7-5-9-35(23-27)50(43,44)45)32-17-11-29(12-18-32)37(31-15-21-34(22-16-31)49(40,41)42)30-13-19-33(20-14-30)39(4-2)26-28-8-6-10-36(24-28)51(46,47)48;;/h5-24H,3-4,25-26H2,1-2H3,(H2-,40,41,42,43,44,45,46,47,48);;/q;2*+1/p-2
• InChI key: DGOBMKYRQHEFGQ-UHFFFAOYSA-L

Description

General description

Light Green SF Yellowish (LGSF) is an acidic triphenylmethane (TPM) dye with auxochromic and bathochromic groups, belonging to the class of polymethine dyes. It is frequently utilized as a histology stain for collagen. Commercial applications of the dye include its usage in cosmetics and personal care products. LGSF is also a permitted food colorant. Various studies indicate the toxicity of the stain and its adverse effects on the environment.[1][2]

Application

Light Green SF Yellowish may be used as a reference dye:

• For the determination of fluoride in drinking water by spectrophotometric method.[3]
• To determine its presence in foodstuff by high-performance liquid chromatography–diode array detection–ion trap time-of-flight tandem mass spectrometry.[4]

Caution

Hygroscopic.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable