1.59270

Methylene blue (C.I. 52015)

redox indicator, Reag. Ph Eur

• Synonym(s): Methylene Blue trihydrate, Methylthioninium chloride, 3,7-Bis(dimethylamino)phenothiazinium chloride, Tetramethylthionine chloride
• Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S · 3H₂O
• CAS Number: 7220-79-3
• Molecular Weight: 373.90
• Beilstein: 3599847
• MDL number: MFCD00012111
• UNSPSC Code: 12352107
• EC Index Number: 200-515-2
• NACRES: NA.05

Properties

• Product Name: Methylene blue (C.I. 52015), Reag. Ph Eur
• Agency: reag. Ph. Eur.; suitable for SM 4500 - NH3
• Quality Level: 200
• form: powder
• potency: 1180 mg/kg LD₅₀, oral (Rat)
• loss: 10-15% loss on drying, 110 °C
• color: dark green
• pH: 3 (20 °C, 10 g/L in H₂O)
• mp: 190 °C (dec.) (lit.)
• solubility: 50 g/L

Description

Analysis Note

Appearance: Dark green powder, eventually with granular and bright parts.
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (ethanol 50 %): 660 - 665 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.003 g/l; ethanol 50 %): 2250 - 2750
Loss on drying (110 °C): 10 - 15 %

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H302
• Precautionary Statements: P264 - P270 - P301 + P312 - P501
• Hazard Classifications: Acute Tox. 4 Oral
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable