1.04724

Indigo carmine (C.I. 73015)

for analysis

• Synonym(s): Indigo carmine (C.I. 73015)
• Empirical Formula (Hill Notation): C₁₆H₈N₂Na₂O₈S₂
• CAS Number: 860-22-0
• Molecular Weight: 466.35
• MDL number: MFCD00005723
• UNSPSC Code: 12171506
• EC Index Number: 212-728-8
• NACRES: NB.21

Properties

• Quality Level: 200
• potency: >2000 mg/kg LD₅₀, oral (Rat)
• composition: dye content, ≥80% spectrophotometric assay
• loss: ≤10% loss on drying, 110°C
• pH: 7 (20 °C, 10 g/L in H₂O)
• mp: >340 °C
• solubility: 1 g/L
• density: 0.71 g/cm³ at 29 °C
• bulk density: 700‑900 kg/m³
• λmax: 608-612 nm in water
• storage temp.: 2-30°C
• InChI: 1S/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17-18H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2/b14-13+;;
• InChI key: KHLVKKOJDHCJMG-QDBORUFSSA-L

Description

Analysis Note

Dye content (spectrophotometrically): ≥ 80 %
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (water): 608 - 612 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.01 g/l; water): 380 - 475
TLC-Test: passes test
Loss on drying (110 °C): ≤ 10 %

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H317
• Precautionary Statements: P261 - P272 - P280 - P302 + P352 - P333 + P313 - P362 + P364
• Hazard Classifications: Skin Sens. 1
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1