# Reportable Quantity Adjustment for Isophorone Diisocyanate
> **Rule** · Direct final rule. · Published 2006-09-11 · Effective 2006-11-13 · 71 FR 53331
## Document
- **Document number:** E6-14849
- **Category:** other
- **Federal Register citation:** 71 FR 53331
- **CFR reference:** 40 CFR 355
- **Publication date:** 2006-09-11
- **Effective date:** 2006-11-13
- **EPA docket:** EPA-HQ-SFUND-2005-0520
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to adjust the reportable quantity (RQ) for Isophorone Diisocyanate (IPDI). Reportable quantities for many Extremely Hazardous Substances (EHS) under the Emergency Planning and Community Right-to- Know Act (EPCRA) were adjusted to their threshold planning quantities (TPQ) in a final rule on May 7, 1996. On September 8, 2003, EPA modified the TPQ for IPDI to 500 pounds. However, EPA inadvertently omitted an RQ adjustment for this substance. Therefore, EPA is now adjusting the RQ for IPDI to be 500 pounds.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/09/11/E6-14849/reportable-quantity-adjustment-for-isophorone-diisocyanate)
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