High-purity formulation
For formulators whose own specification calls for very low organic and metal impurities and a documented trihydrate.
Crystals
Speciality Dyes · Ultra High Pure
Methylene Blue (Ultra High Pure)
Also known as Methylene blue trihydrate, Methylthioninium chloride trihydrate and Ultra pure methylene blue
CAS7220-79-3
FormulaC₁₆H₁₈ClN₃S·3H₂O
MW373.9
Our highest-purity Methylene Blue, free from heavy metals and organic impurities.
Assay97.0–103.0%
GradeUltra High Pure
MW373.9
ISO 9001:2015 certified supplierTested at NABL-accredited laboratories
Overview
About Methylene Blue (Ultra High Pure)
Methylene Blue (Ultra High Pure) is the trihydrate of methylthioninium chloride, purified for buyers who need the cleanest material available. Arsenic, zinc and copper are each held far below their limits, and related substances are controlled by HPLC.
Each batch is identified by infrared spectrum, HPLC retention time and a chloride test, and checked for loss on drying, residue on ignition, related substances, heavy metals and assay on the dried basis.
IdentityC₁₆H₁₈ClN₃S·3H₂O
- CAS number
- 7220-79-3
- Molecular formula
- C₁₆H₁₈ClN₃S·3H₂O
- Molecular weight
- 373.9
- Appearance
- Dark blue crystalline powder with a copper sheen, or green crystals with a bronze sheen
- Grade
- Ultra High Pure
Technical specification
Specification, Ultra High Pure grade
Every batch is released against these limits. Ask for the specification sheet with your quote.
| # | Test | Specification |
|---|---|---|
| 01 | Appearance | Dark blue crystalline powder with a copper-coloured sheen, or green crystals with a bronze-coloured sheen |
| 02 | Solubility | Deep blue solution in water and alcohol; soluble in water and chloroform, sparingly soluble in alcohol |
| 03 | Identification A, infrared spectrum | Concordant with the reference spectrum of Methylene Blue |
| 04 | Identification B, HPLC retention time | Major peak matches the standard solution |
| 05 | Identification C, chloride | Meets the requirement |
| 06 | Loss on drying (75 °C) | 8.0% to 22.0% |
| 07 | Related substances, Azure B | Not more than 2.5% |
| 08 | Related substances, any unspecified impurity | Not more than 0.1% |
| 09 | Related substances, sum other than Azure B | Not more than 0.5% |
| 10 | Arsenic | Not more than 8 ppm |
| 11 | Zinc | Not more than 100 ppm |
| 12 | Copper | Not more than 200 ppm |
| 13 | Residue on ignition | Not more than 0.15% |
| 14 | Assay (dried basis) | 97.0% 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 (Ultra High Pure) is used
Research & reference work
For research laboratories that need a well-characterised, reference-quality dye.
Aquaculture
For premium aquaculture products with the tightest purity requirements.
Packing
Packed to your order
We pack Methylene Blue (Ultra High Pure) in sealed containers suited to the product, from laboratory bottles to bulk packs. Every container carries the product name, batch number, dates and hazard labels. Tell us the pack size and quantity you need.
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?
Tell us the quantity you need. We will suggest the right pack, from laboratory bottles to bulk packs, with your quote.
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 (Ultra High Pure)
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