Rosin core solder thermal decomposition products (colophony)

Agent Name
Rosin core solder thermal decomposition products (colophony)
Major Category
Other Uses
Rosin flux pyrolysis products; Rosin core soldering flux pyrolysis products; [NIOSH]
Pyrolysis Products
Pyrolysis products of rosin core solder include acetone, aliphatic aldehydes, methyl alcohol, methane, ethane, various abietic acids (the major components of rosin), CO & CO2; [NIOSH]
Occupational asthma reported in electronics workers and in workers manufacturing solder flux; [Malo] Both wood rosin and gum rosin are produced in the US. Wood rosin is extracted from resinous stumps of pine trees. Gum rosin is the residue remaining after steam distilling turpentine. Gum rosin is used as a soldering flux. Thermal breakdown products include acetone, methanol, aliphatic aldehydes, carbon dioxide, carbon monoxide, methane, ethane, abietic acid, and related di-terpene acids. [ACGIH]
Exposed workers have short-term reversible airways obstruction. Some workers develop permanent asthmatic disease after a symptom-free period of 1 to 6 years. Three cases of allergic contact dermatitis have been reported in workers exposed to colophony-containing solder-flux smoke. [ACGIH] See "Colophony" and "Abietic acid."
Biomedical References

Exposure Assessment

Explanatory Notes
"Control exposure to resin acids colophony to the lowest achievable concentration." [ACGIH]

Adverse Effects

Skin Sensitizer

Diseases, Processes, and Activities Linked to This Agent


Occupational diseases associated with exposure to this agent:


Industrial Processes with risk of exposure:


Activities with risk of exposure: