1428008

Methylene blue

United States Pharmacopeia (USP) Reference Standard

• Synonym(s): 3,7-bis(Dimethylamino)phenazathionium chloride, Tetramethylthionine chloride
• Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S · xH₂O
• CAS Number: 122965-43-9
• Molecular Weight: 319.85 (anhydrous basis)
• EC Number: 200-515-2
• NACRES: NA.24
• UNSPSC Code: 41116107
• Beilstein/REAXYS Number: 3599847
• Colour Index Number: 52015
• MDL number: MFCD00150006
• eCl@ss: 25140904

Properties

• grade: pharmaceutical primary standard
• agency: USP
• API family: methylene blue
• manufacturer/tradename: USP
• application(s): pharmaceutical (small molecule); pharmaceutical
• SMILES string: CN(C)C1=CC=C2C(SC(C3=N2)=CC(C=C3)=[N+](C)C)=C1.[H]O[H].[Cl-]
• InChI: 1S/C16H18N3S.ClH.H2O/c1-18(2)11-5-7-13-15(9-11)20-16-10-12(19(3)4)6-8-14(16)17-13;;/h5-10H,1-4H3;1H;1H2/q+1;;/p-1
• InChI key: WQVSELLRAGBDLX-UHFFFAOYSA-M

Description

General description

Find answers to frequently asked questions on USP products in USP FAQs.

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.
For further information and support please go to the website of the issuing Pharmacopoeia.

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Other Notes

Sales restrictions may apply.

USP issued SDS can be found here.

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Codes: H302
• Precautionary Statements: P301 + P312 + P330
• Hazard Classifications: Acute Tox. 4 Oral
• Storage Class: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable