ASTM D1193-24 PDF

Full title and description

ASTM D1193-24 — Standard Specification for Reagent Water: a short ASTM specification that defines required characteristics, grades and test criteria for reagent (laboratory) waters used in analytical measurements. The revision clarifies allowed production technologies, specifies constituent limits (conductivity/resistivity, silica, sodium, chlorides, TOC, endotoxins, microbiological contamination) and provides guidance for preparation, monitoring and validation of water purification systems.

Abstract

This specification describes required characteristics for reagent waters, defining four water types (Types I–IV) and three optional microbiological grades. It prescribes analytical limits for ionic, organic and microbiological impurities and includes an informative appendix (X1) with guidance on application, preparation, storage, distribution and validation of water purification systems.

General information

• Status: Active.
• Publication date: 2024 (published November 2024).
• Publisher: ASTM International.
• ICS / categories: 71.040.30 (Chemical reagents / laboratory reagents).
• Edition / version: D1193-24 (current active edition).
• Number of pages: 5.

Scope

Specifies the characteristics and test requirements for waters deemed suitable for use with ASTM standards and other analytical applications. Four water types (I–IV) are defined, with three optional microbiological grades that address bacterial counts and endotoxin limits. The standard applies to preparation, testing and validation of reagent waters and is intended as a reference for laboratories and standards that require defined water quality. Appendix X1 provides practical guidance on monitoring, storage and system validation.

Key topics and requirements

• Definition of four reagent water types (Types I, II, III, IV) and three microbiological grades (A, B, C).
• Analytical limits for conductivity/resistivity, total organic carbon (TOC), silica, sodium and chlorides.
• Microbiological controls and endotoxin limits for specified grades where required.
• Allowance for alternate production technologies provided constituent specifications are met (i.e., distillation, ion exchange, RO, EDI, ultrafiltration, etc.).
• Guidance on sampling, storage, handling, distribution and validation of water purification systems (Appendix X1).

Typical use and users

Used by analytical and research laboratories, quality control groups in pharmaceutical, environmental, food and chemical industries, instrument manufacturers and suppliers of water-purification equipment. Common applications include sample preparation, reagent and buffer preparation, instrument feed (HPLC, IC, LC‑MS), cell/tissue culture and trace analysis where controlled water purity is required.

Related standards

Commonly referenced alongside ISO 3696 (Water for analytical laboratory use — specification and test methods), pharmacopeial water monographs (USP/EP), and instrument- or method-specific water requirements. Federal and regulatory methods may also reference ASTM D1193 for reagent-water specifications.

Keywords

reagent water, laboratory water, Type I, Type II, Type III, Type IV, TOC, conductivity, resistivity, silica, endotoxin, microbiological grade, water purification, ASTM D1193-24.

FAQ

Q: What is this standard?

A: ASTM D1193-24 is the ASTM International specification that defines quality categories and test limits for reagent (laboratory) water used in analytical and laboratory procedures.

Q: What does it cover?

A: It covers definitions for four reagent water types and optional microbiological grades, required analytical limits (conductivity/resistivity, TOC, silica, common ionic contaminants, endotoxins and bacterial levels where applicable) and provides guidance on preparation, storage, handling, distribution and validation of purification systems.

Q: Who typically uses it?

A: Analytical chemists, QC/QA personnel, laboratory managers, instrument vendors and water purification system designers use the standard to specify and verify water quality for analytical methods and laboratory workflows.

Q: Is it current or superseded?

A: The D1193-24 edition is the current active edition (2024). Users should ensure they reference the D1193-24 text for the latest limits and guidance.

Q: Is it part of a series?

A: D1193 is a standalone specification within ASTM’s D19 committee (Water). It is commonly used in conjunction with other water‑ and method‑specific standards (for example ISO 3696 and relevant pharmacopeial monographs) but is not one volume of a numbered series.

Q: What are the key keywords?

A: Reagent water, ultrapure water, Type I/II/III/IV, TOC, conductivity, resistivity, silica, endotoxin, microbiological grade, water purification.