1.06084

Methylthymol blue sodium salt

metal indicator

• Synonym(s): Methylthymol blue sodium salt
• Empirical Formula (Hill Notation): C₃₇H₄₀N₂Na₄O₁₃S
• CAS Number: 1945-77-3
• Molecular Weight: 844.74
• UNSPSC Code: 12171502
• EC Index Number: 217-743-3
• NACRES: NA.05

Properties

• product name: Methylthymol blue sodium salt, metal indicator
• Quality Level: 200
• form: solid
• loss: ≤7% loss on drying, 50°C/ <1 hPa; 3h
• pH: 6.2 (20 °C, 10 g/L in H₂O)
• solubility: 460 g/L
• bulk density: 570 kg/m³
• Amax: 430-450 nm (buffer pH 7.0); 602-606 nm (buffer pH 7.0)
• storage temp.: 2-30°C
• InChI: 1S/C37H44N2O13S.4Na/c1-19(2)23-11-28(21(5)25(35(23)48)13-38(15-31(40)41)16-32(42)43)37(27-9-7-8-10-30(27)53(50,51)52-37)29-12-24(20(3)4)36(49)26(22(29)6)14-39(17-33(44)45)18-34(46)47;;;;/h7-12,19-20,48-49H,13-18H2,1-6H3,(H,40,41)(H,42,43)(H,44,45)(H,46,47);;;;/q;4*+1/p-4
• InChI key: DIZZDZCUMBBRSG-UHFFFAOYSA-J

Description

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ 1 (buffer pH 7.0): 602 - 606 nm
Absorption maximum λ 2 (buffer pH 7.0): 430 - 450 nm
Spec. Absorptivity A 1%/1cm (λ1_max; 0.04 g/l; buffer pH 7.0; calc. on dried substance): ≥ 60
Spec. Absorptivity A 1%/1cm (λ2_max; 0.04 g/l; buffer pH 7.0; calc. on dried substance): ≥ 85
Loss on drying (50 °C/ <1 hPa; 3h): ≤ 7%
Suitability as indicator (for metal titration): passes test

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable