ASTM E1052-20 PDF

Full title and description

ASTM E1052-20 — Standard Test Method / Practice to Assess the Activity of Microbicides against Viruses in Suspension. This practice defines a laboratory suspension test procedure used to evaluate the ability of a chemical or formulation to inactivate viruses when mixed with virus-containing suspensions under controlled contact times and conditions.

Abstract

ASTM E1052-20 describes a quantitative suspension method in which a portion of virus suspension is combined with a test microbicide (typically one part virus to nine parts test substance), incubated at a defined temperature and contact time, and then assayed in an appropriate cell-culture system to determine residual infectivity. The standard includes recommendations for interfering substances, cytotoxicity and susceptibility controls, and data reporting; it is commonly used as an early in vitro screen of virucidal activity for disinfectants, antiseptics, oral rinses and other microbicidal products.

General information

• Status: Active (current practice as of 2020).
• Publication date: 2020 (designation E1052-20; commonly cited as 01 January 2020 / 2020 edition).
• Publisher: ASTM International (ASTM).
• ICS / categories: 65.100.01 (Pesticides and other agrochemicals) — related to antimicrobial/microbicide testing classifications.
• Edition / version: E1052-20 (2020 edition).
• Number of pages: Short practice (commonly published as a brief 3–4 page document in ASTM listings).

Scope

The standard is intended to demonstrate virucidal activity of test substances when challenged with viruses in suspension. It specifies experimental design elements (ratios, temperatures, contact times), inclusion of interfering substances (for example 5% fetal bovine serum or mixtures of proteins/mucin), and required controls (cell-culture controls, cytotoxicity controls, virus susceptibility controls). It does not mandate specific test viruses but suggests a range of envelope and non-enveloped viruses that laboratories may select according to the product and regulatory needs. Regulatory agencies may require additional carrier or surface tests for product registration.

Key topics and requirements

• Suspension test format (typical 1:9 mixing of virus suspension to test substance and controlled incubation).
• Defined contact times and temperatures (laboratories choose conditions relevant to product claims; example typical temperature ≈22 ± 2 °C).
• Use of interfering substances to simulate organic load (e.g., 5% fetal bovine serum or protein/mucin mixtures).
• Mandatory controls: cell-culture control, cytotoxicity control, and virus susceptibility controls to validate results.
• Data presentation: calculation of log10 reductions in infectivity (virucidal performance is often evaluated against a specified log reduction, commonly a ≥4-log reduction is used in comparative contexts).
• Suggested test-virus list covering enveloped and non-enveloped viruses (examples provided in the practice; laboratories select appropriate surrogates or target viruses).

Typical use and users

Used by microbiology and virology laboratories, disinfectant and antiseptic manufacturers, contract testing laboratories, academic researchers and regulatory scientists to screen and document in vitro virucidal activity of formulations (e.g., surface disinfectants, hand sanitizers, oral rinses, antiseptics). The method is frequently cited in peer-reviewed studies assessing antiviral efficacy and in product development and pre-registration testing workflows.

Related standards

Commonly referenced companion and alternative methods include: EN 14476 (European quantitative suspension test for virucidal activity), ASTM E2197 (quantitative disk carrier test), ASTM E1053 (surface/inactivation test formats), ASTM E1838 (in vivo/clinical carrier tests) and other international carrier or surface tests used for regulatory dossiers. Laboratories often use E1052 in combination with carrier/surface tests for a full performance assessment.

Keywords

virucidal, virus suspension test, microbicide, antiviral efficacy, suspension assay, contact time, interfering substance, cytotoxicity control, log reduction, ASTM E1052-20.

FAQ

Q: What is this standard?

A: ASTM E1052-20 is an ASTM International practice/test method for assessing the activity of microbicides against viruses in suspension under controlled laboratory conditions.

Q: What does it cover?

A: It covers a suspension-based virucidal assay workflow (mixing virus with test substance, incubation, neutralization/dilution, and assay of residual infectivity), the use of interfering substances and essential experimental controls, and guidance on data reporting. It is intended as an in vitro screening tool and not as a full substitute for carrier/surface or in-use tests required by some regulators.

Q: Who typically uses it?

A: Microbiology/virology labs, product developers (disinfectants, antiseptics, mouthwashes, sanitizers), contract test labs and researchers performing efficacy studies or supporting regulatory submissions.

Q: Is it current or superseded?

A: The E1052-20 designation indicates the 2020 edition; it is the current ASTM practice for this topic as published in 2020. Users should always check ASTM or national standards organizations for any amendments or newer revisions after 2020.

Q: Is it part of a series?

A: It is part of the suite of ASTM and international methods used to evaluate antimicrobial/virucidal performance and is commonly used alongside related ASTM methods (E2197, E1053, E1838) and international/European standards (EN 14476) to provide a comprehensive efficacy dataset.

Q: What are the key keywords?

A: Virucidal, virus suspension, microbicide, antiviral efficacy, log reduction, contact time, interfering substance, cytotoxicity control, ASTM E1052-20.