NACL Industries Ltd has informed about a downgrade in its credit rating to CRISIL BBB-/Negative for long term and CRISIL A3 for short term facilities, affecting loans worth ₹915 crores. Its subsidiary, NACL Spec-Chem Limited, received a similar downgrade to CRISIL BB+/Negative for long term and CRISIL A4+ for short term accounting for ₹175 crores.