Biological staining
Stains nuclei, bacteria and blood films; used in Loeffler's stain and in many teaching and testing laboratories.
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Speciality Dyes · Extra Pure
Methylene Blue
Also known as Methylthioninium chloride, Basic Blue 9 and C.I. 52015
CAS61-73-4
FormulaC₁₆H₁₈ClN₃S
MW319.85
PubChem6099
A thiazine dye used as a biological stain, redox indicator and aquaculture product, made to a 98–103% assay.
Assay98.0–103.0%
GradeExtra Pure
MW319.85
ISO 9001:2015 certified supplierTested at NABL-accredited laboratories
Overview
About Methylene Blue
Methylene Blue is a thiazine dye. The crystals are dark green with a bronze lustre and dissolve in water to give a deep blue solution.
Methylene Blue is a redox indicator, a biological stain and a dye. In the reduced (leuco) form it is colourless, which makes it useful wherever a visible oxygen or redox change is needed.
IdentityC₁₆H₁₈ClN₃S
- CAS number
- 61-73-4
- Molecular formula
- C₁₆H₁₈ClN₃S
- Molecular weight
- 319.85
- PubChem CID
- 6099
- Appearance
- Dark green crystalline powder with a bronze lustre
- Grade
- Extra Pure
Technical specification
Specification, Extra Pure grade
Every batch is released against these limits. Ask for the specification sheet with your quote.
| # | Test | Specification |
|---|---|---|
| 01 | Appearance (colour) | Green or brown |
| 02 | Appearance (form) | Crystalline powder |
| 03 | Solubility | Clear, blue to dark blue solution at 0.1% in water |
| 04 | Residue on ignition | Not more than 1.2% |
| 05 | Loss on drying | Not more than 4% |
| 06 | Assay (dried basis) | 98.0% to 103.0% |
Need a tighter limit or an extra test? Send us your specification with your enquiry.
Specification sheet (PDF)
Applications
Where Methylene Blue is used
Redox indicator
Indicates oxygen and reducing conditions in analytical methods, demonstrations and dairy testing.
Aquaculture
Used in ornamental-fish and hatchery water-care products and for protecting fish eggs.
Packing
Sealed, labelled and ready to ship
Every container carries the product name, batch number, dates and hazard labels. Other pack sizes are available on request.
250 gSealed bottle
500 gSealed bottle
1 kgSealed bottle
Storage & handling
Keep it dry, closed and out of the light
- Store in the original, tightly closed container in a cool, dry, well-ventilated place.
- Protect from direct light and moisture.
- Dyes stain skin, clothing and surfaces strongly. Wear gloves, eye protection and a dust mask when handling.
Read the MSDS for full hazard, first-aid and disposal information.
Documents
Specification and safety documents
Ask for any of these and we will email them with your quote.
Questions
Frequently asked
Which Methylene Blue should I choose?
Our standard grade suits staining and general laboratory work. Choose Zinc Free where zinc or copper must be controlled, and Ultra High Pure when you need the trihydrate with the tightest impurity limits.
Which pack sizes can I order?
250 g, 500 g and 1 kg packs as standard. Tell us if you need a different size or a repeat schedule.
Can you supply against our own specification?
Send your specification with your enquiry. Our team will confirm which limits we can meet before you order.
Do you ship outside India?
Yes. We hold an Import Export Code and supply both domestic and export buyers. Mention the destination country in your enquiry so we can quote the right packing and documents.
Related products
Other speciality dyes
Enquire
Get a quote for Methylene Blue
Tell us the quantity, pack size and destination. We will confirm price, availability and lead time, and send the documents you need.
Phone & WhatsApp+91 77530 58907
Emailankur.agrawal@spacorporation.in