Metal, oxide or mixture
Antimony metal has CAS number 7440-36-0. Oxides and other compounds are not synonyms for the metal and may have different hazards. Uses described by IARC include lead alloys, batteries, flame retardants, plastics and other products. Each process needs confirmation of the chemical form actually present rather than assumptions based on its industry.
Observe where release occurs
An ingot or finished component behaves differently from fine powder. Material charging, thermal operations and waste removal can change exposure conditions. Fumes generated on heating may contain oxides. Consequently, an inventory of the original metal does not replace identification of contaminants generated by the process or during non-routine interventions.
Avoid mixing hazard classifications
NIOSH and ILO/WHO information describes irritation and respiratory effects associated with antimony metal. IARC evaluated trivalent and pentavalent antimony separately: their conclusions should not simply be transferred to the metal or to every mixture. Correct substance identification helps avoid both understating the hazard and communicating an inappropriate classification.
Measurements and contact
An occupational hygiene assessment should relate each result to the task, sampled particle fraction and laboratory reporting basis. Observe hands, clothing and surfaces where contamination is possible. Hygiene in eating and rest areas also matters, because exposure pathways extend beyond breathing airborne particles and can involve transfer from contaminated hands.
Incompatibilities and control
The ICSC identifies specific fine-powder hazards and chemical incompatibilities, including possible stibine formation under certain conditions. This calls for established procedures and technical process review, not improvised experiments. Prioritise containment and emission capture, with cleaning and waste arrangements compatible with the materials present and reviewed before changing the operation.
What the prevention team should retain
Keep composition records, current safety information, task descriptions and verified controls. Check applicable current criteria before comparing measurements; an older foreign guide does not itself establish a legal limit. Health surveillance and suspected work-related effects require occupational health professionals. An air measurement alone cannot diagnose a worker or establish the cause of symptoms.
If a supplier replaces antimony metal with a compound in a formulation, review the assessment before reusing conclusions. The element may still appear in the analytical report while the substance and its behaviour differ. Recording the change supports checks of compatibility, emissions and interpretation criteria, and prevents a result expressed as Sb from being mistaken for complete chemical identification of the material.
