DuPont Permeation Guide February 2015
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DuPont Permeation Guide February 2015 - 1

DuPont Permeation Guide February 2015

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DuPont Permeation Guide February 2015 - 2

INTRODUCTION The DuPont Permeation Guide and DuPont™ SafeSPEC™ On the following pages you will find permeation data for the DuPont™ Tyvek® and DuPont™ Tychem® fabrics used to produce our chemical protective garments. This permeation guide has been updated with the latest test results for new chemicals and fabrics, with this current issue reflecting the available published data as of February 2015. A new, online source for the very latest permeation data, presented in a customizable and extractable form, is provided by DuPont™ SafeSPEC™ (www.safespec.dupont.co.uk). Beyond the most recent...

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INTRODUCTION – Chemical Permeation What is permeation? Permeation is the process by which a potentially hazardous chemical moves through a material on a molecular level. Permeation can be represented by the following simplified diagram (Fig. 1). Fig. 1 - Permeation On the challenge side of the test cell the outside fabric surface is exposed continuously to the challenge chemical. The sampling side of the test cell is analytically monitored. The normal test duration is 480 minutes. An explanation of the parameters which describe the resistance to permeation is given below. Permeation rate...

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There is the possibility that a breakthrough at a lower permeation rate than the minimum detectable permeation rate has in fact taken place. To be able to assess the actual breakthrough time the minimum detectable permeation rate should be indicated. Performance classes according to EN 14325* Chemical protective clothing is classified into six classes based on a normalized permeation rate of 1.0 µg/cm²/min. Table 1 Normalized permeation rate To be able to compare permeation data, the breakthrough time is reported at defined permeation rates. According to ASTM F739 the normalized...

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The following data are available in SafeSPEC™: The permeation resistance according to time to cumulative permeation of 150 µg/cm² is classified into classes. • Actual Breakthrough time in minutes • Steady State permeation rate in µg/cm²/min • Minimum detectable permeation rate in µg/cm²/min Table 2 Time to cumulative permeation of 150.0 µg/cm²µg/(cm²·min) Interpreting permeation data Tychem® F/F2 Barrier to a range of organic and highly concentrated inorganic chemicals * ISO 16602: Protective clothing for protection against chemicals -- Classification, labelling and performance requirements...

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liquid 98%* Sulfuric acid. The selected fabric should then be taken into the next step of the garment selection process as part of the workplace risk assessment. Example 2: o-Cresol, CAS 95-48-7. Tychem® F is exposed to o-Cresol, CAS 95-48-7 for a test duration of more than 480 minutes. Breakthrough has taken place at the minimum detection rate of 0.01 µg/cm²/min after 124 minutes. The normalized breakthrough time at 0.1 µg/cm²/min has been reached after 180 minutes and the normalized breakthrough time at 1.0 µg/cm²/min after 206 minutes. Based on the results for the normalized breakthrough...

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Important note: The permeation data published have been generated for DuPont by independent accredited testing laboratories according to the test method applicable at that time (EN 369, ASTM F739, EN 374-3 or EN ISO 6529 (method A and B)). The data is typically the average of three samples tested. Cumulative permeation data have been measured or have been calculated based on steady state permeation rate. • eed selection assistance? N • eed technical advice? N • o chemical permeation data for your chemical? N All chemicals have been tested at a concentration of greater than 95% unless...

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I TYCHEM® FABRICS - Permeation Data Chemical Name CAS Physical mins mins mins mins mins mins BT 0.1 Normalized breakthrough time at 0.1 ug/cm2/min mins Minutes BT 1.0 Normalized breakthrough time at 1.0 ug/cm2/min > Largerthan EN Classification according to EN 14325 < Smallerthan CAS Chemical abstracts service registry number * Based on lowest single value 8 Actual breakthrough time; normalized breakthrough time is

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TYCHEM® FABRICS - Permeation Data BT0.1 Normalized breakthrough time at 0.1 ug/cm2/min mjns Minutes imm Immediate (< 4 min) * Based on lowest single value BT 1.0 Normalized breakthrough time at 1.0 ug/cm!/min > Larger than nm Not measured 8 Actual breakthrough time; normalized breakthrough time is EN Classification according to EN 14325 < Smallerthan sat Saturated solution not available CAS Chemical abstracts service registry number N/A Not Applicable

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TYCHEM® FABRICS - Permeation Data BT0.1 Normalized breakthrough time at 0.1 ug/cm2/min mins Minutes imm Immediate (<4 min) * Based on lowest single value BT 1.0 Normalized breakthrough time at 1.0 ug/cmVmm > Larger than nm Not measured 8 Actual breakthrough time; normalized breakthrough time is EN Classification according to EN 14325 < Smallerthan sat Saturated solution not available CAS Chemical abstracts service registry number N/A Not Applicable

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CHEM® FABRICS - Permeation Data BT0.1 Normalized breakthrough time at 0.1 ug/cm2/min mins Minutes imm Immediate (<4 mini * Based on lowest single value BT 1.0 Normalized breakthrough time at 1.0 |jg/cm2/min > Largerthan nm Not measured "Actual breakthrough time; normalized breakthrough time is EN Classification according to EN 14325 < Smallerthan sat Saturated solution not available CAS Chemical abstracts service registry number N/A Not Applicable

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TYCHEM® FABRICS - Permeation Data Chemical Name CAS Physical mins mins mins mins mins mins Carbon tetrafluoride 75-73-0 Vapor Carmustine (3.3 mg/ml, 10 % Ethanol) 154-93-8 Liquid Caustic ammonia (2-3%) 1336-21-6 Liquid Caustic ammonia (28%) 1336-21-6 Liquid Caustic ammonia (30%) 1336-21-6 Liquid Caustic ammonia (32%) 1336-21-6 Liquid Caustic soda (42%) 1310-73-2 Liquid Caustic soda (50%) 1310-73-2 Liquid Caustic soda (>95%, solid) 1310-73-2 Solid Chlor allylene 107-05-1 Liquid Chlor trinitromethan 76-06-2 Liquid Chlorine (gaseous) 7782-50-5 Vapor Chlorine (liquid at -70 °C) 7782-50-5 Liquid...

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