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2-Aminoethanol [MAK Value Documentation in German language, 2016]


Laube, B; Bartsch, R; Hartwig, A; MAK Commission; et al; Arand, Michael (2016). 2-Aminoethanol [MAK Value Documentation in German language, 2016]. The MAK Collection for Occupational Health and Safety, 1(1):172-177.

Abstract

MAK Value Documentation for 2‐Aminoethanol

The German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re‐evaluated the maximum concentration at the work place (MAK value) of 2‐aminoethanol, considering the endpoints respiratory tract irritation, developmental toxicity, and skin absorption. Available unpublished study reports are described in detail.

Critical effect of 2‐aminoethanol is the local respiratory tract irritation. New 5‐day and 28‐day‐guideline‐studies with rats show time‐ and dose‐dependent effects in larynx (squamous metaplasia, inflammation, necrosis), trachea (squamous metaplasia, inflammation), and lung (hyperplasia of mucous and goblet cells). The NOAEC is 10 mg/m3 (3,95 ml/m3). Since 2014, the Commission uses an empirical approach to set MAK values for substances with critical effects on the upper respiratory tract or the eyes. Based on this approach, a concentration of 0.22 ml/m3 for the work place air can be calculated from this study, resulting in a MAK value of 0.2 ml/m3. Since the critical effect is irritation, Peak Limitation Category I is retained with an excursion factor of 1 as the substance is corrosive.

After scaling the oral NOAEL for developmental toxicity of 75, 225, and 500 mg/kg body weight and day for rabbits (dermal) and rats (dermal, oral), respectively, to an inhalation concentration at the work place, the differences to the MAK value, are considered sufficient, and damage to the embryo or foetus is unlikely when the MAK value is observed. Therefore, classification in Pregnancy Risk Group C is confirmed.

Absorption via skin does not contribute significantly to the systemic toxicity of 2‐aminoethanol.

Abstract

MAK Value Documentation for 2‐Aminoethanol

The German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re‐evaluated the maximum concentration at the work place (MAK value) of 2‐aminoethanol, considering the endpoints respiratory tract irritation, developmental toxicity, and skin absorption. Available unpublished study reports are described in detail.

Critical effect of 2‐aminoethanol is the local respiratory tract irritation. New 5‐day and 28‐day‐guideline‐studies with rats show time‐ and dose‐dependent effects in larynx (squamous metaplasia, inflammation, necrosis), trachea (squamous metaplasia, inflammation), and lung (hyperplasia of mucous and goblet cells). The NOAEC is 10 mg/m3 (3,95 ml/m3). Since 2014, the Commission uses an empirical approach to set MAK values for substances with critical effects on the upper respiratory tract or the eyes. Based on this approach, a concentration of 0.22 ml/m3 for the work place air can be calculated from this study, resulting in a MAK value of 0.2 ml/m3. Since the critical effect is irritation, Peak Limitation Category I is retained with an excursion factor of 1 as the substance is corrosive.

After scaling the oral NOAEL for developmental toxicity of 75, 225, and 500 mg/kg body weight and day for rabbits (dermal) and rats (dermal, oral), respectively, to an inhalation concentration at the work place, the differences to the MAK value, are considered sufficient, and damage to the embryo or foetus is unlikely when the MAK value is observed. Therefore, classification in Pregnancy Risk Group C is confirmed.

Absorption via skin does not contribute significantly to the systemic toxicity of 2‐aminoethanol.

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Additional indexing

Item Type:Journal Article, not_refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Pharmacology and Toxicology
07 Faculty of Science > Institute of Pharmacology and Toxicology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:German
Date:28 January 2016
Deposited On:18 Oct 2019 09:03
Last Modified:18 Oct 2019 09:08
Publisher:Wiley-VCH Verlag
ISSN:2509-2383
ISBN:9783527600410
OA Status:Closed
Publisher DOI:https://doi.org/10.1002/3527600418.mb14143d0060

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