Lakeland Permeation & Toxicity Information For

4,4-METHYLENEBIS

Chemical Data

Chemical Toxicity Levels (TL’s)

The following toxicity levels are airborne concentration/volume thresholds derived from publicly available PACs (Protective Action Criteria) compiled by the US Government Department of Energy. These levels are used to develop response plans for emergencies involving the release of hazardous chemicals.
Toxcity Level
Description
Threshold
Units
TL0
No Harmful Effects
Below TL1
mg/m3
TL1
Volume likely to result in only temporary or transient effects
0.16
mg/m3
TL2
Volume likely to result in permanent effects
3.2
mg/m3
TL3
Volume that may result in fatality
19
mg/m3

The information provided alone is not sufficient to select chemical suit protection. However, it can be valuable for EHS professionals to assess the relative toxicity of specific chemicals as part of an overall risk assessment by indicating airborne concentrations that may cause some level of harm.

Chemical Safe-Wear Time Report

Our Safe-Wear Time assessment indicates an effective maximum period a suit may be worn in a specific application before possible leakage may result in harm to the wearer, based on a total inward leakage derived from both fabric permeation and possible suit inward leakage, on the parameters of your application (such as temperature) and on the defined toxicity thresholds (TL’s shown in the tab above) for the chemical.

* Please Note:
All test results quoted are from testing carried out at independent laboratories to the relevant {ASTM/CE} Standard(s). Unless stated otherwise tests are carried out on samples of the relevant protective material as opposed to finished garments. Note that all testing is conducted at specific temperatures according to ASTM or EN standard requirements. As permeation is affected by temperature it is important to consider the likely temperature in any application. Permeation test results record a time to a specific permeation rate as defined by the relevant standard and NOT a time to initial breakthrough of the chemical. Also note that differences may be apparent in some cases between CE and ASTM test results. Whilst the tests are similar, the CE standard records a time to a permeation rate of 1.0µg / min / cm2, whilst ASTM records a time to a permeation rate of 0.10µg / min / cm2. This may explain differences between results. As with all Personal Protective Equipment, selection should be based upon the end users risk assessment, it is the responsibility of the end user to determine the suitability of any PPE as part of this risk assessment and to comply with any/all legislative/governmental requirements. Contact Lakeland for more information.
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