Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 214-014-1 | CAS number: 1072-71-5
The particle size distribution of 2,5-Dimercapto-1,3,4-thiadiazole (DMTD) was determined by scanning electron microscopy after the sample was fractionated by a 100 µm sieve in an OECD 110 (method B) guideline study under GLP. The results are:
weighted sample: 0.996 g
weight fraction <100 µm: 0.0515 g
Sieve mass fraction <100 µm: 5.17%
Sieve Fraction nominal < 100 µm
< 4 µm (respirable)
4-10 µm (thoracic)
10-100 µm (inhalable)
The MMAD (Mass Median Aerodynamic Diameter < 100 µm) has a value of 19.70 µm as spherical particles.
Accounting based on the total sample weight
Particle Size [µm]
Spherical Volume [%]
Total (> 100 µm)
< 4 (respirable)
The vapour pressure of the test substance was determined in a GLP study according to OECD 104 and EU Method A.4 using the effusion method: vapour pressure balance. Vapour pressure was measured in the temperature range of 70 °C to 120 °C and values for 20, 25 and 50 °C were extrapolated from this experimental data:
The visual description of the colour and the physical state (at 20°C and 1013 hPa) resulted in the following: test substance is a yellow solid (crystals).
Expert statement: DMTD has a minor potential for bioaccumulation. The relevant absorption rates can be estimated by expert judgement to 100% (oral), 50% (dermal) and 10% (inhalation).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Close Do not show this message again