Molekula
3-(Diethoxyphosphoryloxy)-1,2,3-benzotriazin-4-(3H)-one (DEPBT)
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
3-(Diethoxyphosphoryloxy)-1,2,3-benzotriazin-4-(3H)-one (DEPBT) is a versatile coupling reagent used in peptide synthesis and organic chemistry to facilitate amide bond formation under mild conditions. It is particularly valued for its efficiency in coupling challenging substrates with minimal racemization or side reactions. DEPBT has a CAS number of 165534-43-0, a molecular formula of C11H14N3O5P, and a molecular weight of 299.22 g/mol. Store at 2 to 8°C, with a signal word of Warning. Molekula supplies DEPBT 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.
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.
-
5 g — $56.10 per pack
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 | White powder |
| Identification | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 20889478 |
| CAS Number | 165534-43-0 |
| IUPAC Name | diethyl (4-oxo-1,2,3-benzotriazin-3-yl) phosphate |
| Molecular Formula | C11H14N3O5P |
| Molecular Weight | 299.22 |
| Exact Mass | 299.0671 |
| SMILES | CCOP(=O)(OCC)ON1C(=O)C2=CC=CC=C2N=N1 |
| InChIKey | AJDPNPAGZMZOMN-UHFFFAOYSA-N |
| InChI | InChI=1S/C11H14N3O5P/c1-3-17-20(16,18-4-2)19-14-11(15)9-7-5-6-8-10(9)12-13-14/h5-8H,3-4H2,1-2H3 |
| PubChem CID | 4293995 |
| REACH Code | Y113 |
| HTS Code | 29336980 |
| Tariff Code | 2933698090 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
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
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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
- 1,2,3-Benzotriazin-4(3H)-one, 3-[(diethoxyphosphinyl)oxy]-
- 3-(Diethoxyphosphoryloxy)-1,2,3-benzotriazin-4(3H)-one
- 3-(Diethoxyphosphoryloxy)-1,2,3-benzotrizin-4(3H)-one
- DEPBT
- DEPBT cpd
- diethyl (4-oxo-1,2,3-benzotriazin-3-yl) phosphate
- Diethyl (4-oxobenzo[d][1,2,3]triazin-3(4H)-yl) phosphate
- Diethyl 3,4-Dihydro-4-oxo-1,2,3-benzotriazin-3-yl Phosphate
- diethyl 4-oxo-3,4-dihydro-1,2,3-benzotriazin-3-yl phosphate
- Phosphoric acid, diethyl 4-oxo-1,2,3-benzotriazin-3-yl ester
Frequently asked questions
What is DEPBT (3-(Diethoxyphosphoryloxy)-1,2,3-benzotriazin-4-(3H)-one) commonly used for?
DEPBT is primarily used as a coupling reagent in peptide synthesis, enabling efficient amide bond formation under mild conditions.
What is the chemical formula and molecular weight of DEPBT?
The chemical formula is **C₁₁H₁₄N₃O₅P**, and the molecular weight is **299.22 g/mol**.
How should DEPBT be stored?
Store DEPBT at **2–8°C** in a cool, dry place, away from direct light and moisture.
What grade or purity is available for DEPBT?
Molekula supplies DEPBT in **analytical and synthetic-grade purity**, typically ≥97% by HPLC.
Can Molekula supply DEPBT in bulk quantities?
Yes, DEPBT is available in bulk, with minimum order quantities and custom packaging options—contact us for details.
What documentation comes with a DEPBT order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation.
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.