Is Portland cement toxic?

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Tags

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2. #burns
3. #components
4. #cause
5. #hexavalent
6. #portland
7. #crystalline
8. #chemical
9. #cancer
10. #contain
11. #cement
12. #available
13. #chromium
14. #irritation
15. #types
16. #caustic
17. #hazardous
18. #silica
19. #severe
20. #powder
21. #exposure