Tricyclazole & heterocycle intermediate
2-Hydrazino-4-Methylbenzothiazole (2-H-4-MBT) Supplier & Distributor in India & Worldwide
Chelora Agrochem is a trusted 2-Hydrazino-4-Methylbenzothiazole (2-H-4-MBT) supplier and distributor in India, connecting buyers with high-purity material sourced from leading, quality-approved manufacturers. Our (4-methyl-1,3-benzothiazol-2-yl)hydrazine meets 98% min purity with controlled residual hydrazine, full documentation and reliable bulk supply across India and to buyers worldwide.
As a specialised distributor of chemical products, we do not manufacture in-house — instead we source only from reliable, audited manufacturers, giving you dependable material, competitive pricing and a single point of contact for all your 2-H-4-MBT requirements, backed by COA, MSDS and TDS on every order.
- CAS number
- 20174-68-9
- Formula
- C8H9N3S
- Molecular weight
- 179.24 g/mol
- Purity
- 98% min
Quick product specifications
2-Hydrazino-4-Methylbenzothiazole at a glance
Identifiers, physical data and trade codes for 2-H-4-MBT. Batch-specific figures are confirmed on the Certificate of Analysis supplied with each consignment, in India and on export shipments alike.
- Chemical name
- 2-Hydrazino-4-Methylbenzothiazole
- CAS number
- 20174-68-9
- Molecular formula
- C8H9N3S
- Molecular weight
- 179.24 g/mol
- IUPAC name
- (4-Methyl-1,3-benzothiazol-2-yl)hydrazine
- EC number
- Not assigned
- HS code
- 2934 20National subheading as per destination
- UN number
- Per supplier SDSNo UN number is normally assigned to this product; the classification stated on the supplier Safety Data Sheet and the shipping documents for your consignment applies
- Appearance
- White to light grey crystalline solidNeedle-shaped crystals when pure; industrial grade is light grey
- Melting point
- About 163–165 °C
- Boiling point
- Decomposes before boiling
- Density
- Not establishedCrystalline solid; bulk density on request
- Flash point
- Not establishedCombustible solid — keep away from ignition sources
- Solubility
- Practically insoluble in waterSoluble in hot ethanol, DMF and dilute mineral acids
- Purity
- 98% min
- Synonyms
- 2-H-4-MBT4-Methyl-2-benzothiazolehydrazine · (4-Methylbenzothiazol-2-yl)hydrazine
- Product form
- Crystals or powder
- Documentation
- COA, MSDS & TDSSupplied with every order
Product overview
What is 2-Hydrazino-4-Methylbenzothiazole?
2-Hydrazino-4-Methylbenzothiazole (2-H-4-MBT) is the dedicated intermediate for tricyclazole, the systemic fungicide used against rice blast. One cyclisation with formic acid closes the hydrazino group onto the ring nitrogen and gives the triazolobenzothiazole that is the finished active.
With the formula C8H9N3S (CAS 20174-68-9), 2-H-4-MBT is a white to light grey crystalline solid melting at about 164 °C. It is practically insoluble in water but dissolves in hot ethanol, DMF and dilute mineral acids — the hydrazino group is basic enough to form salts, which is how it is often purified.
The methyl group at position 4 is what distinguishes it from the plain and 6-methyl hydrazinobenzothiazoles, and it is not interchangeable with them: it ends up as the 5-methyl group of tricyclazole, so the wrong isomer gives the wrong active. Buyers therefore specify isomeric purity as closely as assay.
How it is made
2-H-4-MBT is made by hydrazinolysis. o-Toluidine is converted to 4-methylbenzothiazole-2-thiol and then to 2-chloro-4-methylbenzothiazole, which is treated with hydrazine hydrate to displace the chlorine. The product is crystallised, washed free of excess hydrazine and dried to specification.
What that means for your process
- Controlled isomeric methylbenzothiazole content, checked by HPLC
- Low residual free hydrazine — tested on every batch
- Consistent melting range for reliable cyclisation
- Low moisture and low ash for clean downstream processing
Applications
What is 2-Hydrazino-4-Methylbenzothiazole used for?
2-H-4-MBT is a dedicated intermediate with one dominant outlet and several specialty uses. Its applications include:
Tricyclazole manufacture
The dominant outlet: cyclisation with formic acid closes the triazole ring.
- Cyclisation with formic acid or formamide
- 5-Methyl-1,2,4-triazolo[3,4-b]benzothiazole
- Rice blast fungicide technical and formulations
Pharmaceutical scaffolds
Hydrazinobenzothiazoles are a standard entry to fused triazole systems.
- Triazolobenzothiazoles and thiadiazoles
- Hydrazones and Schiff bases from aldehydes and ketones
- Antimicrobial and antifungal screening scaffolds
Dyes & specialty chemicals
The benzothiazole core carries colour and metal-binding chemistry.
- Benzothiazole-based azo and methine colourants
- Metal-complexing and corrosion-inhibitor derivatives
- Custom benzothiazole synthesis
Process route
How is 2-H-4-MBT used to make tricyclazole?
In a single cyclisation. The hydrazino group is condensed with formic acid, and the resulting formyl hydrazide closes onto the benzothiazole ring nitrogen to form a fused 1,2,4-triazole. The product is 5-methyl-1,2,4-triazolo[3,4-b][1,3]benzothiazole — tricyclazole.
2-Hydrazino-4-Methylbenzothiazole
Charged dry. Assay, isomeric purity and residual hydrazine decide downstream yield.
C8H9N3SFormylation
Condensed with formic acid or formamide to the formyl hydrazide.
HCOOHRing closure
The hydrazide cyclises onto the ring nitrogen to form the fused 1,2,4-triazole.
CyclisationTricyclazole
Crystallised and dried as the rice blast fungicide active.
TricyclazoleIn depth
2-Hydrazino-4-Methylbenzothiazole applications by industry
Below is a detailed breakdown of where 2-H-4-MBT is used and the role it plays in each downstream product.
| Industry | Typical downstream products | Role of 2-H-4-MBT |
|---|---|---|
| Agrochemicals | Tricyclazole technical and formulations | Core intermediate |
| Pharmaceuticals | Triazolobenzothiazole and thiadiazole scaffolds | Intermediate |
| Dyes & pigments | Benzothiazole azo and methine colourants | Building block |
| Specialty chemicals | Corrosion inhibitors and metal-complexing agents | Building block |
| Research chemicals | Hydrazones and Schiff bases for screening libraries | Reagent |
Safety
Is 2-Hydrazino-4-Methylbenzothiazole hazardous?
Yes. 2-H-4-MBT is harmful if swallowed, causes skin and eye irritation and may cause an allergic skin reaction. As a hydrazine derivative it is handled with the additional precautions that class attracts, including the assumption that it may be a mutagen and carcinogen until shown otherwise.
2-H-4-MBT should be stored in sealed bags or drums in a cool, dry, ventilated place, protected from light and air and kept away from heat, strong oxidisers and strong acids, with which hydrazine derivatives can react vigorously. Handle it with chemical-resistant gloves, goggles and protective clothing, with dust extraction or local exhaust ventilation at the charging point, and avoid raising dust when weighing. Prevent release to drains and waterways. A full MSDS is supplied with every order.
Signal word: Danger
Harmful if swallowed · causes skin and eye irritation · may cause an allergic skin reaction · handled with the precautions applied to hydrazine derivatives
Safe-handling essentials
- Dust extraction or local exhaust ventilation at the charging point
- Chemical-resistant gloves, goggles and protective clothing
- Avoid raising dust when weighing and transferring
- Treat as a potential sensitiser — avoid all skin contact
- Keep bags and drums sealed, cool, dry and out of direct light
- Store well away from strong oxidisers and strong acids
- Prevent release to drains, soil and waterways
- Confirm the transport classification on the SDS before despatch
Grades
2-Hydrazino-4-Methylbenzothiazole grades & technical specifications
We supply 2-H-4-MBT in standard technical grade for tricyclazole manufacture and in high-purity grades with tightened isomer and residual hydrazine limits.
| Parameter | Specification |
|---|---|
| Assay (purity) | 98% min |
| Appearance | White to light grey crystals or powder |
| Melting range | 163–165 °C |
| Isomeric methylbenzothiazoles | 0.5% max |
| Free hydrazine | 0.1% max |
| Moisture | 0.5% max |
| Sulfated ash | 0.5% max |
| Product form | Crystals or powder |
Note: Values are representative. Batch-specific figures are provided on the Certificate of Analysis (COA) supplied with each consignment.
Supply
Packaging, MOQ & supply
From trial quantities for process validation to repeat container loads on contract — packed, documented and dispatched to your plant in India or overseas.
Packaging
25 kg HDPE-lined bags and fibre or HDPE drums; 50 kg drums and smaller development packs on request.
Minimum order quantity
Flexible — single bags for process validation through to full-container loads.
Shelf life
Long shelf life in sealed, unopened packs stored cool, dry and protected from light and air.
Dispatch
Pan-India dispatch and worldwide export with complete dangerous-goods documentation and logistics support.
Why buy from us
Why choose Chelora as your 2-H-4-MBT supplier?
As an established 2-Hydrazino-4-Methylbenzothiazole supplier and distributor based in India and shipping worldwide, we work with a wide network of trusted manufacturers to combine consistent quality with dependable service. More about Chelora Agrochem.
High purity, every batch
98% min assay, sourced only from quality-approved manufacturers we have worked with and audited.
Full documentation
COA, MSDS and TDS travel with every order, so your QA and EHS teams are never chasing paperwork.
Reliable bulk supply, flexible MOQ
Single packs for process trials through to repeat container loads on schedule.
Worldwide supply
Export-grade packing, dangerous-goods documentation and on-time dispatch to plants across Asia, the Middle East, Europe, Africa and the Americas.
Technical & safe-handling support
Guidance on storage, PPE, hydrazine handling and process fit from a team that knows benzothiazole chemistry.
One point of contact
Source 2-H-4-MBT alongside your other intermediates — one enquiry, one team, one invoice.
Ordering
How to order 2-Hydrazino-4-Methylbenzothiazole from Chelora
Ordering is simple and fast — most enquiries are answered with pricing and availability within 24 hours.
- 1
Send your enquiry
Tell us the grade, quantity and application you are buying for.
- 2
Receive a quotation
We send pricing along with the COA and MSDS for your review.
- 3
Request a sample
Test suitability for your process before you commit to a bulk order.
- 4
Confirm the order
Lock in quantity, packaging and delivery preference.
- 5
Dispatch & tracking
We dispatch with full documentation and keep you updated until delivery.
Documentation
2-Hydrazino-4-Methylbenzothiazole MSDS & COA
A summary of key safety information and a representative Certificate of Analysis. The complete 16-section Safety Data Sheet and the actual batch COA are supplied with each shipment — and both are sent with your quotation when you ask for a quote.
Safety data summary (MSDS)
| Section | Details |
|---|---|
| Hazard classification | Acute toxicity cat. 4 (oral); skin irritation cat. 2; eye irritation cat. 2; skin sensitisation cat. 1; handled with the precautions applied to hydrazine derivatives (possible mutagen / carcinogen) |
| Signal word | Danger |
| First aid — inhalation | Move to fresh air; keep at rest; get medical attention |
| First aid — skin | Remove contaminated clothing; wash thoroughly with soap & water; get medical advice |
| First aid — eyes | Rinse with water for several minutes; get medical advice |
| Handling | Use PPE; control dust; ventilate; avoid all skin contact |
| Storage | Cool, dry, sealed and dark; away from heat, strong oxidisers & strong acids |
| Environment | Prevent release to drains, soil and waterways |
| Transport | Confirmed on the supplier SDS and shipping documents |
Certificate of Analysis (representative)
| Test parameter | Specification | Method |
|---|---|---|
| Assay (purity) | 98% min | HPLC |
| Appearance | White to light grey crystals | Visual |
| Melting range | 163–165 °C | Capillary |
| Free hydrazine | 0.1% max | Titrimetric |
| Moisture | 0.5% max | Karl Fischer |
| Sulfated ash | 0.5% max | Gravimetric |
The actual batch COA is supplied with each shipment.
FAQ
Frequently asked questions
Common questions from buyers specifying 2-H-4-MBT for fungicide, pharmaceutical and dye intermediate production.
What is 2-Hydrazino-4-Methylbenzothiazole used for?
2-H-4-MBT is used above all as the intermediate for tricyclazole, the systemic fungicide used against rice blast, which is formed by cyclising it with formic acid. It is also used for triazolobenzothiazole and thiadiazole scaffolds in pharmaceutical research, for benzothiazole-based colourants, and for corrosion inhibitors and metal-complexing agents.
What is the CAS number of 2-H-4-MBT?
The CAS number is 20174-68-9 and the molecular formula is C8H9N3S, with a molecular weight of 179.24 g/mol. The IUPAC name is (4-methyl-1,3-benzothiazol-2-yl)hydrazine; it is also sold as 4-methyl-2-benzothiazolehydrazine.
How is 2-Hydrazino-4-Methylbenzothiazole made?
It is made by hydrazinolysis. o-Toluidine is converted to 4-methylbenzothiazole-2-thiol and then to 2-chloro-4-methylbenzothiazole, which is treated with hydrazine hydrate to displace the chlorine. The product is crystallised, washed free of excess hydrazine and dried.
How is tricyclazole made from 2-H-4-MBT?
The hydrazino group is condensed with formic acid or formamide, and the resulting formyl hydrazide closes onto the benzothiazole ring nitrogen to form a fused 1,2,4-triazole. The product is 5-methyl-1,2,4-triazolo[3,4-b][1,3]benzothiazole, which is tricyclazole.
Does the position of the methyl group matter?
Very much. The 4-methyl isomer is the one that becomes the 5-methyl group of tricyclazole, so the 6-methyl and unsubstituted hydrazinobenzothiazoles give different products altogether. Isomeric purity is specified and tested on every batch for exactly this reason.
Is 2-Hydrazino-4-Methylbenzothiazole hazardous?
Yes. It is harmful if swallowed, causes skin and eye irritation and may cause an allergic skin reaction, and as a hydrazine derivative it is handled with the additional precautions that class attracts. Use PPE, dust extraction and sealed storage away from oxidisers and acids; we supply a full MSDS with every order.
Do you provide COA and MSDS for 2-H-4-MBT?
Yes, we provide a batch-specific COA and MSDS with every order, including the free hydrazine result, plus technical support on request.
Do you supply and export 2-Hydrazino-4-Methylbenzothiazole?
Yes, we supply 2-H-4-MBT across India and export internationally with complete documentation, sourced from reliable manufacturers.
Request a quote or sample
Need a reliable 2-H-4-MBT supplier?
Looking for a dependable 2-Hydrazino-4-Methylbenzothiazole (2-H-4-MBT) supplier and distributor — in India or anywhere we export to? Tell us the grade and quantity you need — our team responds with competitive bulk pricing, samples and complete documentation (COA, MSDS, TDS) within 24 hours.
Or email source@cheloraagrochem.com