Methylene Blue Zinc Free (Basic Blue 9)

Methylene Blue Zinc Free (Basic Blue 9) Chemical Structure

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Methylene Blue Zinc Free also referred to as Basic Blue 9, is a type of dye that sees widespread application in the dying of fabrics. Basic Blue 9 is a hue that can be found in colored paper.

Macsen Labs group’s Methylene Blue Synthesis Process granted a patent from the Indian patent office

The Indian Patent Office granted a patent to Mr Achal Agrawal, CEO of Macsen Labs, Udaipur. The title of the patent is Novel Improved Method for Synthesis of Diaminophenothiazine Compounds and it concerns a novel process for synthesising the compound Methylthioninium Chloride or Methylene Blue. Macsen Labs has now achieved a unique position by this patent and from now nobody will be able to copy this process. Read more

Macsen Laboratories is the leading manufacturer & supplier of Methylene Blue Zinc Free (Basic Blue 9) with ISO certification.
Name of Product Methylene Blue Zinc Free (Basic Blue 9)
IUPAC Name [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;chloride
Synonyms Methylthioninium Chloride ; C.I 52015 ; Methylene Blue Trihydrate; Methylene Blue 2B; Basic Lake Blue BB; Basic Blue BOC; Basic Blue 4RF; Basic Blue BO; Methylene Violet
CAS No 122965-43-9
Molecular Formula C16H18ClN3S
Molecular Weight 319.9 g/mol


SR. No Criteria Limit/Specification Our Results
1 Description Dark Blue crystalline Powder with a copper- coloured sheen. Dark Blue crystalline Powder with a copper- coloured sheen.
2 Solubility Must Pass Test Passes Test
3 Identification Must Pass Tests Passes Tests
4 Loss On Drying (At 75˚C At Pressure Nmt 5mm Of Mercury For 4 Hrs.) LIMIT: IN BETWEEN 8.0%-18.0% 11-15%
5 Residue On Ignition NMT 1.2% 0.3-0.7%
6 Arsenic LIMIT: 8PPM 2-6 PPM
7 Copper Or Zinc Must Pass Test Passes Test.
8 Chromatographic Purity >Must Pass Test Passes Test.
9 Assay (With Reference To Subs.
Dried At 105˚C & As % Of (C16h18n3cls)
MINIMUM 98.0% TO 103.0% MAXIMUM 98.5 – 99.9%
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    Resources on Methylene Blue

    What is Methylene Blue | An Overview of Methylene Blue
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    Methylene Blue & Covid-19 – Research So Far
    Staining with Methylene Blue | Different uses and examples
    Methylene Blue’s uses in Fish Aquaculture
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    Methylene Blue Against Cyanide Poisoning
    Methylene Blue Injection: Indications, Dosage & Brands
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