Aquaculture
Preferred for fish and hatchery products, where zinc and copper are unwanted.
Powder
Speciality Dyes · Zinc Free
Methylene Blue, Zinc Free
Also known as Methylene Blue ZF and Zinc-free methylthioninium chloride
CAS61-73-4
FormulaC₁₆H₁₈ClN₃S
MW319.85
PubChem6099
Methylene Blue made without zinc chloride, with copper plus zinc held below 0.02% and arsenic below 8 ppm.
Assay98.0–103.0%
GradeZinc Free
MW319.85
ISO 9001:2015 certified supplierTested at NABL-accredited laboratories
Overview
About Methylene Blue, Zinc Free
Much commercial Methylene Blue is made as a zinc chloride double salt. Our Zinc Free grade is produced without zinc, and each batch is tested for copper, zinc and arsenic.
It is chosen for aquaculture, staining and formulation work where metal content matters.
IdentityC₁₆H₁₈ClN₃S
- CAS number
- 61-73-4
- Molecular formula
- C₁₆H₁₈ClN₃S
- Molecular weight
- 319.85
- PubChem CID
- 6099
- Appearance
- Dark green crystalline powder
- Grade
- Zinc Free
Technical specification
Specification, Zinc Free 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 | Copper (Cu) + zinc (Zn) | Not more than 0.02% |
| 07 | Arsenic | Not more than 8 ppm |
| 08 | 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, Zinc Free is used
Biological staining
Used in microscopy and teaching laboratories where a low-metal dye is specified.
Formulation
An ingredient for formulators who need a documented low-metal grade.
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 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, Zinc Free
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