BENZOYL LEUCO METHYLENE BLUE
- CAS NO.：1249-97-4
- Empirical Formula: C23H23N3OS
- Molecular Weight: 389.51
- MDL number: MFCD00059153
- EINECS: 215-005-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-12-31 14:38:37
What is BENZOYL LEUCO METHYLENE BLUE?
The Uses of BENZOYL LEUCO METHYLENE BLUE
10-Benzoylleucomethylene Blue was used as a color-forming agent in colorless copying paper. It is also recommended for documents to make them safe against forgery.
Preparation
10-Benzoylleucomethylene Blue[1249-97-4] is obtained by reduction of Methylene Blue with hydrosulfite in aqueous alkaline medium, followed by benzoylation and then extraction of the crude product with toluene.
Mechanism of action
The mechanism of color-forming decomposition of N-benzoylleucomethylene blue during the copying process has been studied; the reaction is induced by photons and proceeds via free radicals.
Properties of BENZOYL LEUCO METHYLENE BLUE
| Melting point: | 198°C |
| Boiling point: | 589.3±50.0 °C(Predicted) |
| Density | 1.258±0.06 g/cm3(Predicted) |
| solubility | very faint turbidity in hot Toluene |
| form | powder to crystal |
| pka | 5.80±0.20(Predicted) |
| color | White to Light yellow to Green |
| EPA Substance Registry System | 10H-Phenothiazine-3,7-diamine, 10-benzoyl-N,N,N',N'-tetramethyl- (1249-97-4) |
Safety information for BENZOYL LEUCO METHYLENE BLUE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for BENZOYL LEUCO METHYLENE BLUE
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