Category: Pre-market additives
                              Description: 
                              Ultra-Pflex® and Ultra-Pflex 100 are surface treated, premium quality, engineered nano particle precipitated calcium carbonate.
Typical Use: 
                              PVC plastisol, MS polymer, silicone and polyurethane sealant systems
Apparent use of Nanotechnology: precipitated calcium carbonate coated with stearic acid (primary particle size: 70nm)
                              Reason for Inclusion: 
                              "Average primary particle size: .07 microns" -Retrieved 2/5/2021 from https://www.mineralstech.com/docs/default-source/company/ultrapflex.pdf?sfvrsn=da35c703_2
"Precipitated calcium carbonate coated with stearic acid" -Retrieved 2/5/2021 (see safety data sheet)
                                   Company: 
                                   Minerals Technologies Inc.
                                   
                              
                              Trade: Laborers
                              Safety Data Sheet (SDS):