Shopping Cart Items: 0   Sub-Total : US$0.00
Welcome, Guest ( Login )
Celebrating 34 years providing high quality products and advice.
Our Local Time Is 12:26:54 AM.
Call us at 818-786-0600. We are here to help!
Laboratory Fume and Biological Hood Enclosures We Offer Huge Savings
on Fume Hoods and Enclosures for your laboratory.
Laboratory Water Systems Laboratory Process Filters Laboratory Equipment Water Treatment

APS TechNotes See all articles

ASTM Type I II and III Water Specifications 2010


Everything you need to make lab water
New Lab Water Systems
Replacement filters for all brands of existing lab water system


Type IType IIType IIIType IV
Electrical conductivity, max, S/cm0.0561.00.255.0
Electrical resistivity, min181.04.00.2
pH*** 5.0 to 8.0
Total organic carbon (TOC), max, g/L5050200no limit
Sodium, max, g/L1510 50
Chlorides, max, g/L1510 50
Total silica, max, g/L3 3500no limit

Bacterial contamination

When bacteria levels need to be controlled, reagent grade types should be further classified as follows:

Type A Type BType C
Maximum heterotrophic bacteria count10/1000 mL10/100 mL100/10 mL
Endotoxin, EU/mlB 0.030.25not applicable


*pH is not a significant indicator when comparing ionic contamination.

Also See :
  • Measuring pH of pure water
  • NCCLS and CAP Water Specs



    ATSM Specs

  • Open To The Public

    Why Use APS??

    Independent Reps Wanted

    Need Live Help?

    Contact Us
    818-786-0600

    Short Lead times.
    Lab Water Deionizer

    Best
    Lab Water System

    Top Sellers

    Most Popular
    Fume Hoods

    Glassware Washers

    Images are representative of the products. Images may or may not be of the actual product. If it is important e-mail us for an actual image if available.

    * Flat Rate UPS shipping when able to ship via UPS and is in the USA excluding Hawaii and Alaska.
    Larger Items may not be able to ship via UPS, in that case freight charges will be quoted seperately.
    International shipping will be quoted after the order is placed. You will have the opportunity to cancel before we finalize your order.

    Terms and conditions
    Credit Application
    Privacy Policy
    Google Apps
    List All Products