Product Description: WTW Nitrification Inhibitor N-Allylthiourea 50mL
WTW Nitrification Inhibitor N-Allylthiourea 50mL is a specialized laboratory reagent designed for use in Biochemical Oxygen Demand (BOD) testing and water analysis. The product shown in the image contains N-Allylthiourea at a concentration of 5 g/L and is supplied in a 50 mL bottle.
N-Allylthiourea is used as a nitrification inhibitor to suppress the activity of nitrifying microorganisms during BOD measurement. This helps prevent additional oxygen consumption caused by nitrification from influencing the BOD result. WTW documentation identifies NTH 600 as a nitrification inhibitor containing N-allylthiourea at 5 g/L and lists it for use with OxiTop® BOD measurement procedures.
Key Features
- Product Name: WTW Nitrification Inhibitor N-Allylthiourea
- Product Type: Nitrification Inhibitor / BOD Testing Reagent
- Model: NTH 600
- WTW Order No.: 209331
- Concentration: 5 g/L N-Allylthiourea
- Pack Size: 50 mL
- Chemical: N-Allylthiourea
- CAS Number: 109-57-9
- Molecular Formula: C₄H₈N₂S
- Molecular Weight: 116.18 g/mol
- Brand: WTW
- Manufacturer: WTW Wissenschaftlich-Technische Werkstätten GmbH
- Origin: Germany
- Application: BOD measurement and water analysis
The WTW safety documentation identifies product NTH 600 / Order No. 209331 as Nitrification Inhibitor N-Allylthiourea and states that it is an aqueous solution containing N-Allylthiourea.
Applications of WTW Nitrification Inhibitor
BOD Testing
N-Allylthiourea is used during Biochemical Oxygen Demand (BOD) measurements to suppress nitrification. Nitrifying bacteria can consume dissolved oxygen while converting nitrogen compounds, which can contribute to the measured oxygen demand. Using a nitrification inhibitor helps separate this effect from the oxygen demand associated with biodegradable organic matter.
Water Quality Analysis
The reagent is suitable for laboratory water-quality testing, particularly procedures where BOD is determined using respirometric methods. WTW application documentation specifies N-allylthiourea solution NTH 600 at 5 g/L as a reagent for BOD5 determination.
OxiTop® BOD Systems
WTW operating instructions specifically list NTH 600 nitrification inhibitor among the accessories/reagents required for OxiTop® BOD measurement.
Nitrification Suppression
The active compound, N-Allylthiourea, is used to inhibit nitrification during BOD analysis. Published laboratory applications have used 5 g/L N-Allylthiourea to suppress nitrification in BOD samples.
Recommended Use in BOD Measurement
The required quantity of NTH 600 depends on the selected BOD measuring range and sample volume. WTW’s OxiTop® operating manual provides specific quantities for different ranges.
These quantities are specified in WTW’s OxiTop® operating documentation and should be followed according to the instrument and testing procedure being used.
Chemical Information
N-Allylthiourea is the active nitrification-inhibiting compound in this reagent. Its chemical formula is C₄H₈N₂S, with a molecular weight of approximately 116.18 g/mol. The CAS number is 109-57-9.
The WTW safety data identifies the product as an aqueous solution and reports it as a colourless, odourless liquid that is miscible with water.
WTW Nitrification Inhibitor N-Allylthiourea 50mL WTW Nitrification Inhibitor N-Allylthiourea 5 g/L, 50mL for BOD Testing
Safety & Handling
WTW safety documentation states that the N-Allylthiourea solution is harmful if swallowed. Appropriate laboratory precautions should therefore be followed when handling the reagent. Wear suitable laboratory protective equipment, avoid unnecessary skin and eye contact, and keep the container properly closed when not in use.
Always consult the latest manufacturer safety documentation before use, storage or disposal.
Price in Bangladesh
WTW Nitrification Inhibitor N-Allylthiourea 50mL is a specialized reagent suitable for BOD testing, environmental laboratories, wastewater laboratories, water-quality testing facilities, universities, research institutions and industrial laboratories.
For the current WTW Nitrification Inhibitor price in Bangladesh, stock availability and institutional or bulk requirements, customers can contact M/S Bright Scientific Co.

Why Choose WTW Nitrification-Inhibitor from Bright Scientific?
M/S Bright Scientific Co. supplies laboratory chemicals, water-testing reagents, scientific instruments and laboratory consumables to laboratories, universities, research institutions and industries throughout Bangladesh.
- Genuine WTW laboratory reagent
- NTH 600 model
- Order No. 209331
- 5 g/L N-Allylthiourea concentration
- 50 mL pack
- Suitable for BOD testing
- Helps suppress nitrification during BOD measurement
- Suitable for OxiTop® BOD systems
- German-origin product
- Nationwide delivery across Bangladesh
- Institutional and bulk order support
Frequently Asked Questions (FAQ)
1. What is WTW Nitrification-Inhibitor?
WTW Nitrification Inhibitor is a laboratory reagent containing N-Allylthiourea, used to suppress nitrification during BOD measurement.
2. What is the model number?
The product is NTH 600.
3. What is the WTW order number?
The WTW order number is 209331.
4. What is the concentration?
The reagent contains 5 g/L N-Allylthiourea.
5. What is the pack size shown?
The product image shows a 50 mL bottle.
6. What is N-Allylthiourea used for?
It is used as a nitrification-inhibitor, particularly during BOD testing and water-quality analysis.
7. Is it used with OxiTop® systems?
Yes. WTW’s OxiTop® documentation lists NTH 600 as the nitrification-inhibitor used during BOD measurement.
8. What is the chemical formula of N-Allylthiourea?
The chemical formula is C₄H₈N₂S, and its molecular weight is approximately 116.18 g/mol.
9. Who manufactures WTW NTH 600?
The product is manufactured by WTW Wissenschaftlich-Technische Werkstätten GmbH, Germany.
10. Where can I buy WTW Nitrification-Inhibitor in Bangladesh?
You can contact M/S Bright Scientific Co. for current price, stock availability and delivery information.
Contact Information
M/S Bright Scientific Co.
Phone: 01711285976







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