Molekula
Thidiazuron (1-phenyl- 3-(1,2,3-thiadiazol-5-yl)urea)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Thidiazuron is a synthetic plant growth regulator used in agriculture to promote cell division, delay senescence, and enhance crop yield. Its principal documented application is as a pre-harvest cotton defoliant to ease harvesting, and it also serves as a growth regulator in plant tissue culture and kiwifruit production. It functions as a cytokinin analog, influencing plant development and stress resistance. Available in powder form with a purity of ≥98%, it has a CAS number of 51707-55-2, molecular formula C9H8N4OS, and molecular weight of 220.251 g/mol. Stored at ambient temperature, it carries a warning signal word due to potential hazards. Molekula supplies Thidiazuron from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
100 mg — £54.00 per pack ex VAT · £64.80 inc. VAT
-
1 g — £163.20 per pack ex VAT · £195.84 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Yellowish Powder |
| Melting Point | 210°C - 212°C |
| Loss on Drying | ≤ 2.0% |
| Assay | ≥ 95% |
| Residue on Ignition | ≤ 1.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless crystals |
| Odour | Odorless |
| Melting Point | 210.5 - 212.5 °C (decomposes) |
| Water Solubility | 20 mg/L at 23 °C |
| Vapour Pressure | 2.30 × 10⁻¹¹ mmHg at 25 °C |
| pKa | pKa = 8.86 |
| log P (octanol/water) | 1.77 |
Source: PubChem CID 40087 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 38679790 |
| CAS Number | 51707-55-2 |
| IUPAC Name | 1-phenyl-3-(thiadiazol-5-yl)urea |
| EC Number | 257-356-7 |
| Molecular Formula | C9H8N4OS |
| Molecular Weight | 220.251 |
| Exact Mass | 220.0419 |
| SMILES | C1=CC=C(C=C1)NC(=O)NC2=CN=NS2 |
| InChIKey | HFCYZXMHUIHAQI-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H8N4OS/c14-9(12-8-6-10-13-15-8)11-7-4-2-1-3-5-7/h1-6H,(H2,11,12,14) |
| PubChem CID | 40087 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| HTS Code | 2934.99.90.01 |
| Tariff Code | 2934999090 |
Safety & GHS
-
Health Hazard
GHS07
-
Hazardous to the Environment
GHS09
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- (N-1,2,3-Thiadiazolyl-5)-N'-phenylurea
- 1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea
- 1-phenyl-3-(thiadiazol-5-yl)urea
- Defolit
- Dropp
- N-Phenyl-N'-1,2,3-thiadiazol-5-ylurea
- N'-phenyl-N-(1,2,3-thiadiazol-5-yl)carbamimidic acid
- SN 49537
- THIDIAZURON
- Urea, N-phenyl-N'-1,2,3-thiadiazol-5-yl-
Frequently asked questions
What is Thidiazuron used for?
Thidiazuron is primarily used as a plant growth regulator in agriculture, promoting cell division and delaying senescence in plants.
What is the chemical formula and molecular weight of Thidiazuron?
The formula is C9H8N4OS with a molecular weight of 220.251 g/mol.
How should Thidiazuron be stored?
It should be stored at ambient temperature, away from moisture and direct sunlight.
What grade of Thidiazuron does Molekula supply?
Molekula supplies Thidiazuron in technical grade, suitable for research and industrial applications.
Can Molekula supply Thidiazuron in bulk?
Yes, Molekula can supply Thidiazuron in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a Thidiazuron order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.