{"data":{"id":"us/42-cfr-tables-to-subpart-i-of-part-84","jurisdiction":"us","citation":"42 CFR Tables to Subpart I of Part 84","heading":"Tables to Subpart I of Part 84","body":"Table 5—Canister Bench Tests and Requirements for Front-Mounted and Back-Mounted Gas Mask Canisters\n[42 CFR part 84, subpart I]\nCanister type Test condition Test atmosphere Number of tests Maximum allowable penetratin (parts per million) Minimum service life (minutes) 1\nGas or vapor Concentration (parts per million) Flow rate (liters per minute)\nAcid gas As received SO2 20,000 64 3 5 12\nEquilibrated Cl2 20,000 64 3 5 12\nSO2 20,000 32 4 5 12\nCl2 20,000 32 4 5 12\nOrganic vapor As received CCl4 20,000 64 3 5 12\nEquilibrated CCl4 20,000 32 4 5 12\nAmmonia As received NH3 30,000 64 3 50 12\nEquilibrated NH3 30,000 32 4 50 12\nCarbon monoxide As received CO 20,000 4 64 2 (3) 60\nEquilibrated CO 5,000 2 32 3 (3) 60\nCO 3,000 2 32 3 (3) 60\nCombination of 2 or 3 of above types 5\nCombination of all above types 6\n1 Minimum life will be determined at the indicated penetration.\n2 Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere will be 25 ±2.5 °C.\n3 Maximum allowable CO penetration will be 385 cm 3 during the minimum life. The penetration shall not exceed 500 p/m during this time.\n4 Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C.\n5 Test conditions and requirements will be applicable as shown in this table.\n6 Test conditions and requirements will be applicable as shown in this table, except the minimum service lives for acid gas, organic vapor, and ammonia will be 6 min instead of 12 min.\nTable 6—Canister Bench Tests and Requirements for Chin-Style Gas Mask Canisters\n[42 CFR part 84, subpart I]\nCanister type Test condition Test atmosphere Number of tests Maximum allowable penetration (parts per million) Minimum service life (minutes) 1\nGas or vapor Concentration (parts per million) Flow rate (liters per minute)\nAcid gas As received Equilibrated SO2 50,000 64 3 5 12\nCl2 5,000 64 3 5 12\nSO2 5,000 32 4 5 12\nCl2 5,000 32 4 5 12\nOrganic vapor As received Equilibrated CCl4 5,000 64 3 5 12\nCCl4 5,000 32 4 5 12\nAmmonia As received Equilibrated NH3 5,000 64 3 50 12\nAs received Equilibrated NH3 5,000 32 4 50 12\nCarbon monoxide As received CO 20,000 2 64 2 (3) 60\nCO 5,000 4 32 3 (3) 60\nCO 3,000 2 32 3 (3) 60\nCombination of 2 or 3 of above types 5\nCombination of all above types 6\n1 Minimum life will be determined at the indicated penetration.\n2 Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere will be 25 ±2.5 °C.\n3 Maximum allowable CO penetration will be 385 cm 3 during the minimum life. The penetration shall not exceed 500 p/m during this time.\n4 Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C.\n5 Test conditions and requirements will be applicable as shown in this table.\n6 Test conditions and requirements will be applicable as shown in this table, except the minimum service lives for acid gas, organic vapor, and ammonia will be 6 min instead of 12 min.\nTable 7—Canister Bench Tests and Requirements for Escape Gas Mask Canisters\n[42 CFR part 84, subpart I]\nCanister type Test condition Test atmosphere Number of tests Maximum allowable penetration (parts per million) Minimum service life (minutes) 1\nGas or vapor Concentration (parts per million) Flow rate (liters per minute)\nAcid gas As received SO2 5,000 64 3 5 12\nEquilibrated Cl2 5,000 64 3 5 12\nSO2 5,000 32 4 5 12\nCl2 5,000 32 4 5 12\nOrganic vapor As received CCl4 5,000 64 3 5 12\nEquilibrated CCl4 5,000 32 4 5 12\nAmmonia As received NH3 5,000 64 3 50 12\nEquilibrated NH3 5,000 32 4 50 12\nCarbon monoxide As received CO 10,000 2 32 2 (3) 4 60\nCO 5,000 5 32 3 (3) 60\nCO 3,000 2 32 3 (3) 60\n1 Minimum life will be determined at the indicated penetration.\n2 Relative humidity of test atmosphere will be 95 ±3 pct; temperature of test atmosphere will be 25 ±2.5 °C.\n3 Maximum allowable CO penetration will be 385 cm 3 during the minimum life. The penetration shall not exceed 500 p/m during this time.\n4 If effluent temperature exceeds 100 °C during this test, the escape gas mask shall be equipped with an effective heat exchanger.\n5 Relative humidity of test atmosphere will be 95 ±3 pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C.","path":["Title 42—Public Health","CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER G—OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES","PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES","Subpart I—Gas Masks"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"b11db36472bf0df3c5cbdc5efa1494bcae745fe130500a19dc8a8bbf979b9a77","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-84.126","next":"us/42-cfr-84.130"},"notice":"GroundRules: Original legal text. Not legal advice."}