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Code of Federal Regulations <br />Title 49 - Transportation <br />Volume: 2Date: 1998-10-01 Original Date: 1998-10-O1Title: Appendix A to A§ 172.101 - List of Hazardous <br />Substances and Reportable Quantities Context: -. -. SUBCHAPTER C - HAZARDOUS MATERIALS <br />REGULATIONS. PART 172 - HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS <br />MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, AND TRAINING <br />REQUIREMENTS. Subpart B - Table of Hazardous Materials and Special Provisions. Section 172.101 - Purpose <br />and use of hazardous materials table. <br />Complete list available at https://www.govinfo.gov/content/pkg/CFR-1998-title49-vol2/xml/CFR- <br />1998-title49-vol2-sec 172-101-appA.xml <br />Table 1 to Appendix A—Hazardous Substances Other Than Radionuclides <br />Hazardous substance <br />Reportable quantity (RQ) <br />pounds (kilograms <br />Ferrous sulfate <br />1000 (454) <br />Phosphoric acid <br />5000 (2270) <br />Sodium hydroxide <br />1000 (454) <br />Sulfuric acid <br />1000 (454) <br />15 <br />