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Whether you require small volumes for routine analytical testing or bulk quantities for manufacturing, we provide a consistent, top-tier supply of ASTM Type III water. Available in multiple pack sizes, our water is designed to fit seamlessly into your laboratory or industrial workflows.
With almost 50 years of experience in chemical manufacturing, ReAgent is a multinational supplier of Type III water, fully compliant with ASTM standards.
Type III water is a high-quality laboratory-grade purified water. Positioned as a step above economy-grade Type IV water, Type III offers higher purity and lower conductivity. This makes it ideal for standard laboratory procedures, general chemical synthesis, and qualitative analysis.
Applications of ASTM Type III water include:
At ReAgent, we use advanced purification technology to ensure every batch of Type III water meets the precise specifications of the ASTM standard. To achieve the required electrical conductivity and purity levels, we produce our Type III water using comprehensive methods such as reverse osmosis, distillation, and deionization.
Our production facility continuously monitors critical water quality parameters during manufacturing. Following production, our dedicated quality control team conducts rigorous batch testing using calibrated analytical instruments to verify purity.
ReAgent is your dependable partner for purified water solutions in the US. We combine large-scale manufacturing capabilities with a customer-focused approach to support your operational needs.
When you partner with ReAgent for your ASTM Type III water needs, you benefit from:
If you’re looking for a premium supplier of ASTM D1193 Type III water, contact us to discuss your requirements or get a custom quote.

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At ReAgent, we manufacture, pack, and blend chemical products for companies across many different industries. Our services include:

| Description | Limits | Units |
|---|---|---|
| Conductivity (25°C) | <0.25 | µS/cm |
| Resistivity (25°C) | >4 | Mohm/cm |
| Sodium | <10 | ppb |
| Chloride | <10 | ppb |
| Silica | <500 | ppb |
| Conforms to ASTM D1193 Type III |
| Item | Specification |
|---|---|
| Conductivity (25°C) | <0.25 μS/cm |
| Resistivity (25°C) | >4 Mohm/cm |
| Sodium | <10 ppb |
| Chloride | <10 ppb |
| Silica | <500 ppb |
| Conforms to ASTM D1193 Type III |
Typical Analysis, while based on historic data, should only be used for indicative purposes.
For a true analysis of any product please request a Certificate of Analysis.
Download our material safety data sheet (MSDS) for technical data and comprehensive information about this product.

If you want to find the exact delivery charge for an item or order, simply add the item or items you’re interested in to your basket and the delivery charge as well as any tax will be calculated and itemized for you. No card details are taken at this point, so you’re under no obligation to purchase water online.
Firm delivery date within 24 hours. We always dispatch orders as soon as possible, but please note that non-stock items can take around 5 days to reach you. Please contact us before ordering if you require an estimated delivery date or see our delivery information for more information.
Unfortunately not. Our couriers only deliver on working days from Monday to Friday.
We cannot accept overseas orders on our website. However, in some cases, we are able to ship outside the mainland US. Please contact us for further information.
As many of the chemicals we supply are hazardous, we are legally obligated to use licensed couriers who are specialists in carrying such goods. These specialist couriers cost more than regular delivery services, but your order will arrive safely and legally.
We can offer an AM delivery service for some counties. Please contact us for information before placing your order.
Yes, but please contact us to prearrange this. Depending on the quantity of hazardous chemicals you want to collect, you may need to have applicable training or a current licence to legally transport them away from our premises. We may not able to release goods without proof of this.
Yes, we can deliver directly to your customers with a delivery note that excludes invoice details, and we can add your logo and branding to the product labels. Contact us for more information.