Transcription of 232 ELEMENTAL IMPURITIES—LIMITS
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232 ELEMENTAL IMPURITIES—LIMITS
232 ELEMENTAL IMPURITIES LIMITSINTRODUCTIONThis general chapter specifies limits for the amounts of ELEMENTAL impurities in drug products. ELEMENTAL impurities includecatalysts and environmental contaminants that may be present in drug substances, excipients , or drug products. These impuri-ties may occur naturally, be added intentionally, or be introduced inadvertently ( , by interactions with processing equip-ment and the container closure system). When ELEMENTAL impurities are known to be present, have been added, or have thepotential for introduction, assurance of compliance to the specified levels is required. A risk-based control strategy may be ap-propriate when analysts determine how to assure compliance with this standard. Due to the ubiquitous nature of arsenic, cad-mium, lead, and mercury, they (at the minimum) must be considered in the risk assessment.
for pharmaceuticals. Thus, the limit was established assuming the most common (mercuric) inorganic form. Limits for articles ... The concentration of elemental impurities in drug substances and excipients must be controlled and, where present, docu-mented. The acceptable levels for these impurities depend on the material's ultimate use.
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