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HJ 1229-2021: Guidelines for screening of priority assessment chemical substances
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Guidelines for screening of priority assessment chemical substances
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HJ 1229-2021
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Standard similar to HJ 1229-2021 HJ 1347.1 HJ 1347.2 HJ 1346.1 Basic data | Standard ID | HJ 1229-2021 (HJ1229-2021) | | Description (Translated English) | Guidelines for screening of priority assessment chemical substances | | Sector / Industry | Environmental Protection Industry Standard | | Word Count Estimation | 7,771 | | Issuing agency(ies) | Ministry of Ecology and Environment | HJ 1229-2021: Guidelines for screening of priority assessment chemical substances---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Technical Guidelines for Priority Evaluation of Chemical Substance Screening)
National Ecological Environment Standard of the People's Republic of China
Technical Guidelines for Priority Evaluation of Chemical Substance Screening
Guidelines for screening of priority assessment chemical substances
This electronic version is the official standard text, which is reviewed and typeset by the Environmental Standards Institute of the Ministry of Ecology and Environment.
Published on 2021-12-21
2022-01-01 Implementation
Released by the Ministry of Ecology and Environment
directory
Foreword...ii
1 Scope...1
2 Normative references...1
3 Terms and Definitions...1
4 Screening principles and procedures...2
5 Screening technical requirements...3
6 Report preparation...4
Technical Guidelines for Priority Evaluation of Chemical Substance Screening
1 Scope of application
This standard specifies the principles, procedures and technical requirements for the screening of priority assessment chemical substances.
This standard applies to the screening of chemical substances that are prioritized for evaluation in the environmental risk assessment and control of chemical substances.
This standard can be used as a technical basis for the competent departments of ecological environment at all levels, enterprises and institutions, etc. to determine the priority evaluation of chemical substances.
2 Normative references
This standard refers to the following documents or clauses thereof. For dated references, only the dated version applies to this standard.
For undated references, the latest edition (including all amendments) applies to this standard.
GB/T 24782
GB 30000.22
Methods for determination of persistent, bioaccumulative and toxic substances and highly persistent and highly bioaccumulative substances
Specification for Classification and Labelling of Chemicals Part 22.Germ Cell Mutagenicity
GB 30000.23 Chemical Classification and Labeling Specification Part 23.Carcinogenicity
GB 30000.24 Specification for Classification and Labeling of Chemicals Part 24.Reproductive Toxicity
GB 30000.26 Specification for Classification and Labeling of Chemicals Part 26.Specific Target Organ Toxicity Repeated Exposure
GB 30000.28 Specifications for Classification and Labelling of Chemicals Part 28.Hazards to the Aquatic Environment
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
chemical substances
Elements and compounds derived from nature or processed for commercial purposes.
3.2
Priority assessment chemical substances
Chemical substances with potential environmental risks that need to be prioritized through environmental risk assessment to determine whether priority control is required.
3.3
environmental risk
Chemical substances with environmental or health hazard properties enter or may enter during production, processing, use, disposal and disposal.
After entering the environment, the degree and probability of harmful effects on the ecological environment and human health, excluding production safety accidents and transportation accidents
risks caused by emergencies.
4 Screening principles and procedures
4.1 Screening principles
Priority evaluation of chemical substances screening should follow the following principles.
a) Based on environmental risks and focused
Based on the concept of environmental risk, the environmental and health hazards and exposures of chemical substances are comprehensively considered, and chemical substances are prioritized for evaluation. Focus
Chemical substances that already exist in the environment and have relatively large hazards, including chemical substances that enter or may enter the environment during production and use, and
degradation products, etc.
b) Scientificity and feasibility
Scientifically determine the screening indicators and screening methods, taking into account the current technical conditions, to ensure practicality. The screening process is based on the latest technological developments,
Promptly adopt mature new technologies and new tools to improve the accuracy of screening.
c) Dynamic and open
Given the changing production and use of chemical substances, environmental exposures, and the availability of relevant information and data, the hazard characteristics of chemical substances are
With the deepening of the understanding of chemical properties and the continuous development of environmental monitoring technology, the screening of chemical substances for priority evaluation should be dynamically adjusted according to the changing situation.
4.2 Screening procedures
4.2.1 The screening of chemical substances for priority evaluation includes screening preparation, data collection and evaluation, and determination of chemical substances for priority evaluation. Prioritize evaluation
The chemical screening procedure is shown in Figure 1.
4.2.2 In the screening preparation stage, a screening plan shall be formulated, the screening objectives and requirements shall be determined, and the screening objects of chemical substances to be prioritized for evaluation shall be selected.
4.2.3 During the data collection and evaluation stage, data on the hazards and exposure of chemical substances should be comprehensively collected, and the validity of the data should be evaluated.
Whether the screening needs are met, and the data used for screening is determined.
4.2.4 In the determination stage of chemical substances for priority evaluation, the chemical substances shall be screened according to the screening conditions, and the priority of evaluation shall be comprehensively considered to determine the chemical substances.
Chemicals are prioritized for evaluation.
5 Screening technical requirements
5.1 Screening preparation
5.1.1 The screening objects of chemical substances for priority evaluation shall be selected in combination with management objectives and priorities.
5.1.2 When selecting screening objects, the following chemical substances should be given priority.
a) According to GB/T 24782, it is a persistent, bioaccumulative and toxic substance (PBT) or a highly persistent and highly bioaccumulative substance
Quality (vPvB);
b) Chemical substances with carcinogenicity, mutagenicity or reproductive toxicity, focusing on GB 30000.23, GB 30000.22,
GB 30000.24 standard, classified as 1A or 1B carcinogenic, mutagenic or reproductive toxic chemical substances;
c) Chemical substances that are both persistent and toxic or bioaccumulative and toxic at the same time, of which the toxicity focuses on the basis of GB
30000.23, GB 30000.22, GB 30000.24, GB 30000.26, GB 30000.28 are classified as 2 or more
Carcinogenicity, mutagenicity, reproductive toxicity, repeated exposure to specific target organs, or long-term aquatic hazard;
d) Other highly hazardous chemicals that should be given priority attention, such as endocrine disruptors, highly suspected PBT or vPvB substances,
Highly suspected carcinogenic, mutagenic or reproductive toxicant, long-term aquatic hazard, or specific target organ repeated exposure toxicity is classified as 1
chemical substances, etc.;
e) There is evidence that there are chemical substances that have been exposed to the environment, such as detected in environmental media, or detected in organisms and caused by environmental exposure
Wait;
f) Potential environmental exposure chemicals that should be given priority attention, such as large annual production or use, widely dispersed use, such as
scattered venues or used in public daily life, etc.
5.2 Data collection and evaluation
5.2.1 Organize the information of the selected chemical substances, so that each chemical substance has a standard Chinese and English name and unique identifier (such as chemical
Academic Abstracts Number (CAS Number), Simplified Molecular Linear Input Specification Code (SMILES Code), International Compound Identification Code (InChI Code), etc.).
5.2.2 Data collection should meet the screening requirements. The content of data collection includes.
a) Hazard data, including data on different toxicological and ecotoxicological endpoints of chemical substances, mainly carcinogenicity, mutagenicity, reproductive
Toxicity, repeated dose toxicity, aquatic toxicity, etc.;
b) Exposure data, including detection data of chemical substances in environmental media or organisms, emission data, production, usage, use
application, field of use, etc.;
c) Persistence and bioaccumulation data, including biodegradation data, abiotic degradation data, bioaccumulation, biomagnification and other parameters
or data, etc.;
d) Auxiliary information, including physical and chemical data related to environmental exposure of chemical substances, such as saturated vapor pressure, water solubility, and partition coefficient, and
Other relevant data information, domestic and foreign management information, scientific research information, etc. to support the identification of hazards or exposure.
5.2.3 The hazard data, persistence, bioaccumulation data and related physical and chemical data of chemical substances can be derived from test data, domestic and foreign official
The released chemical substance environmental risk assessment report, authoritative chemical substance database, scientific and technological literature, etc., the collected data shall be traceable. right
For indicators with missing data, cross-reference (read-across), (quantitative) structure-activity relationship ((Q)SAR) models, etc.
estimating techniques. Exposure data of chemical substances can be derived from environmental measurements or data from relevant management departments, scientific research project data, scientific literature,
Model estimation, etc.
5.2.4 The quality of the collected chemical substance data shall be assessed in accordance with the relevant national technical specifications, and the following principles shall be followed.
a) For test data, evaluate the test method, test process, data description, test standard, good laboratory practice, etc.
If necessary, use technical solutions confirmed by experts and determine whether the data is available based on the weight of evidence;
b) For model estimation data, analyze the validity and application domain of the model, and evaluate the applicability of the model.
5.2.5 The data used for priority evaluation of chemical substance screening shall be valid data after data evaluation. When screening, priority should be given to
Data with high reliability; for data with the same level of reliability, the most sensitive data should be used or methods such as statistics and weight of evidence should be used to determine whether
The data.
5.2.6 The data should be organized and recorded in a standardized text format for subsequent work.
5.3 Determination of Priority Assessment Chemical Substances
5.3.1 The basic principles, procedures and technical requirements for screening should be followed to screen priority chemical substances. Identify priority chemicals for evaluation
Consider various factors such as chemical hazards, exposure, and environmental management needs.
5.3.2 Chemical substances with only hazard or exposure are usually not evaluated as priority. However, for existing evidence that there is or may be a potential
In terms of environmental risks, or chemical substances that have caused environmental pollution, chemical substances should be prioritized for evaluation.
5.3.3 When screening chemical substances for priority evaluation, chemical substances with relatively high hazard and environmental exposure potential should be given higher priority.
priority.
6 Report preparation
The process and results of prioritizing chemical screening should be documented in a report. The content of the report should at least include screening objectives, screening
Object, data content and source, data evaluation basis, data selection method, screening conditions and description of screening results, etc.
Reference basis, screening plan, etc. should be listed in the form of attachments.
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