CertificatesOverviewCertificatesStatementsProduct Stewardship Solvay Peroxides certificatesPlease find below the certificates of Solvay Peroxides: North America Document Hydrogen Peroxide - Kosher Certificate (Deer Park).pdf (PDF - 70.36 KB) Document Hydrogen Peroxide - Kosher Certificate (Longview).pdf (PDF - 59.29 KB) Document Solvay Chemicals, Inc. ISO 9001 Certification Rev 1 - expires 120426.pdf (PDF - 1 MB)