TATACHEM Tata Chemicals Ltd Credit Rating Changes Announcement 2025 - Credit Rating Reaffirmed Tata Chemicals Ltd informed that CRISIL Ratings Limited has reaffirmed the credit ratings for its Non-Convertible Debentures at CRISIL AA+/Stable and Commercial Paper at CRISIL A1+ as of May 6, 2025..Find Corporate Announcements for Press Releases, AGM, Insider Trading & SAST, Results and Corporate Action for Tata Chemicals Ltd