n-butylphosphorothioic triamide

CAS: 94317-64-3

Overview

N-Butylphosphorothioic triamide , with CAS 94317-64-3 , is commonly known as NBPT and marketed under the trade name Agrotain. It is a urease inhibitor used in agriculture to slow the enzymatic breakdown of urea in soil.

By blocking urease activity, it reduces nitrogen loss through ammonia volatilization, improving fertilizer efficiency. NBPT is the active ingredient in enhanced-efficiency urea and UAN fertilizer formulations.

It extends the window for nitrogen uptake by crops and is applied as a coating or blending additive in granular urea production. This allows manufacturers to deliver urease-inhibited products without reformulating the base nutrient.

Livestock manure management programs use NBPT-treated slurry applications to reduce ammonia emissions from fields. Turf and specialty crop programs also incorporate these treated fertilizers where precise nitrogen retention is critical.

This chemical is essential for performance and regulatory compliance in modern agricultural practices. NBPT is supplied as a solid or in solution, with liquid concentrate formulations common for direct blending into fertilizer coatings.

Technical grade is the standard commercial specification for agricultural use. It is typically sourced in bulk quantities suited to fertilizer manufacturing operations and large-scale industrial distribution networks.

Physical Properties

Melting Point	54 °C
Boiling Point	277.4±23.0 °C(Predicted)
Density	1.171±0.06 g/cm3(Predicted)
Flash Point	96°C
Appearance	White Crystalline Solid
Color	White to Off-White
Form	Solid
Water Solubility	4.3 g/L at 25 ºC
Vapor Pressure	0.001-1.7Pa at 25℃
Log P	-0.32-0.444 at 20-25℃

Safety & Handling

Danger GHS05 GHS08 GHS07 Hazard Statements H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation H361 Suspected of damaging fertility or the unborn child Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code	29299090
Storage Class	11 - Combustible Solids
WGK (Germany)	1

Other Names

Industries

Agriculture & Feed