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Carbon Black Content for Medical-Grade Coatings

Carbon Black Content for Medical-Grade Coatings


Anyone know permissible carbon black levels for use in medical-grade, non-implantable coatings?

Any empirical data available with respect to cytotoxicity?


William Gunnar

RE: Carbon Black Content for Medical-Grade Coatings


Anyone else interested? I've found my answer.

While carbon black was reclassified 'Group 2B' some time ago, the route of entry was inhalation (by rats).  

To be classified a carcinogen or reproductive toxin, by OEHHA'a own definition, carbon black must meet the following criteria:

1) airborne
2) unbound
3) respirable size

But, within polymeric films (coatings), carbon black is encapsulated. ..."Exposure to carbon black, per se, does not occur when it remains bound within a product matrix, such as rubber, ink, or paint."


William Gunnar

RE: Carbon Black Content for Medical-Grade Coatings

Thanks for finishing the story.


Mike Halloran
Pembroke Pines, FL, USA

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