NBPT
CAS 94317-64-3 C4H14N3PS
- CAS number
- 94317-64-3
- EC number
- 435-740-7
- Formula
- C4H14N3PS
- Molar mass
- 167.21 g/mol
- HS code
- ~2929.90 (indicative)
Supply of NBPT
- Grades
- Supplied as a technical solid (≥97–99%), an analytical standard, or liquid nitrogen-stabiliser formulations (around 25% active); the solid suits melt-coating and the liquids suit spray-coating or UAN blending.
- Packaging
- Solid: 25 kg fiber drums/bags, supersacks · Liquid: 200–250 L drums, 1000 L IBC, ISO tank
- Documents
- CoA, SDS and TDS on request; certificate of origin where the destination requires it.
- Delivery
- Worldwide, including the United States, Canada, the United Kingdom, Germany and the rest of the EU, the United Arab Emirates, India, Singapore, Malaysia and Australia. Quoted EXW, FOB, CIF or DAP.
NBPT is an additive for urea, the most widely used nitrogen fertilizer. When urea lies on the soil surface, a natural enzyme breaks it down quickly and part of the nitrogen escapes into the air as ammonia. NBPT slows that enzyme for one to two weeks, giving rain or irrigation time to carry the fertilizer into the soil where the crop can use it. It is usually supplied as a liquid that is sprayed onto the urea granules.
Technical details
NBPT is the most widely used urease inhibitor for urea fertiliser. It temporarily blocks the urease enzyme in soil and crop residue, slowing the hydrolysis of urea to ammonium carbonate so that less nitrogen escapes as ammonia gas before rain or irrigation carries it into the soil. It is the active ingredient in most commercial urease-inhibitor formulations for urea and UAN. Pure NBPT is a waxy solid, but most of the tonnage moves as an amber liquid formulation in NMP or glycols, which coats granules evenly and blends into UAN. Ehlinar supplies technical solid and liquid nitrogen-stabiliser formulations matched to your coating process.
Appearance: Pure NBPT is a white to off-white crystalline/waxy solid (mp ~54–60 °C), but it is commonly supplied as an amber/pale-yellow liquid formulation (~20–80% NBPT in NMP or glycols) for urea coating.
Applications
How we supply
- Certificate of Analysis (CoA), lot-specific where available
- Safety Data Sheet (SDS / MSDS)
- Technical Data Sheet (TDS)
- Certificate of Origin / Certificate of Conformity
Independent third-party inspection can be arranged on request, with the agency and scope agreed per trade. Representative samples can be requested for qualification, subject to supplier availability. We recommend incoming quality control against the agreed CoA.
Quoted on standard Incoterms (e.g. EXW, FOB, CIF, DAP) as agreed per trade. Delivery region, packaging and grade are confirmed per quote.
Documents and services above are subject to supplier availability and confirmed per quote; nothing here is an offer.
Typical / indicative values — not a binding specification
| Property | Typical |
|---|---|
| Assay (technical solid) | ≥97–99% |
| Active content (liquid formulation) | ~20–80% NBPT in NMP or glycols (commonly ~25%) |
| Melting point (pure solid) | ~54–60 °C |
| Typical dose on urea | ~0.05–0.1% w/w active (≈500–1000 ppm) |
Also known as
N-(n-butyl) thiophosphoric triamide · nBTPT · BTPT · N-butylphosphorothioic triamide · active in Agrotain / Anvol / Limus
Frequently asked questions
- Is NBPT the same as Agrotain's active ingredient?
- Yes — NBPT (CAS 94317-64-3) is the active in Agrotain, and in related products such as Anvol and Limus (alongside other actives).
- What dose is used on urea?
- Typically about 0.05–0.1% w/w active (~500–1000 ppm); EU references cite roughly 0.04–0.10%.
- Should I buy solid or liquid NBPT?
- Solid technical NBPT suits melt-coating; solvent formulations suit spray-coating or UAN blending.
- How stable is it?
- NBPT is hydrolytically sensitive — keep cool, dry and sealed. The solid is more stable than dilute solutions.
- Is it approved for use?
- It is an EU-approved urease inhibitor under the Fertilising Products Regulation (2019/1009), REACH-registered, and marketed in the US as a nitrogen stabiliser.
- What is the difference between NBPT and DCD?
- They act at different steps. NBPT is a urease inhibitor: it slows urea hydrolysis and cuts ammonia loss at the surface. DCD is a nitrification inhibitor: it works later, slowing the conversion of ammonium to nitrate and reducing leaching and nitrous-oxide emissions. Some enhanced-efficiency fertilisers use both.
- Why is NBPT usually supplied as a liquid?
- Pure NBPT melts at roughly 54–60 °C, which makes the solid awkward to meter onto granules at scale. Dissolving it in NMP or a glycol gives a sprayable liquid that coats urea evenly and blends into UAN solutions. Solid grades are still used for melt-coating.
Enquire about NBPT
Related products
Figures and identifiers here are compiled from public references and provided for general information; they are indicative, not a specification. See all products.