Preventing chromium(VI) formation in leather requires control throughout production, supported by technical monitoring, quality assurance and communication along the supply chain. This page translates the introduction published in Dalir’s Persian archive and links to the full Persian document. It is not a translation of the entire PDF.
The old Persian page title and download label contain “IV”, while the introduction discusses “VI”. This translation uses chromium(VI), or hexavalent chromium, consistently. The original document link is retained below.
The purpose of this special publication is to provide tannery professionals with sufficient information to produce leather that meets the applicable standards. It explains that measures and obligations need to be observed across the whole leather-production process to prevent the formation of chromium(VI).
The introduction describes suitable tanning methods and appropriate equipment as the basis for controlling this risk. It emphasises a production quality-assurance system in which technical parameters are recorded and monitored, helping a defined level of leather quality to be maintained over time.
It also notes the role of technical standards in helping tanneries produce leather with a reduced potential for chromium(VI) formation. Beyond technical measures, transparency and communication between participants in the supply chain are needed to ensure that leather is suitable for its intended finished product.
Original Persian translation credited to: Maryam Samsarha, responsible expert in the Textile and Leather Research Group, Standard Research Institute, as identified on the source page.
Chromium(VI) may form through oxidation of chromium(III) used in some tanning processes, as explained in Commission Regulation (EU) No 301/2014. These are different oxidation states; a reference to total chromium does not by itself establish chromium(VI) content.
Under REACH Annex XVII, Entry 47, leather articles that contact skin, and the relevant leather parts of articles, must not be placed on the market at chromium(VI) concentrations of 3 mg/kg or more, based on the dry weight of that leather. This is contextual information, not a claim that any Dalir batch has been tested or certified.
Download the full Persian guidance on preventing chromium(VI) formation (PDF). The linked document is in Persian; the introduction above is the English translation of the website text.
Is this the full guidance in English?
No. It translates the website introduction; the full linked PDF remains in Persian.
What is the main prevention principle?
The source emphasises process control, technical monitoring, quality assurance and supply-chain communication.
Does this article certify a leather batch?
No. A batch assessment requires the relevant test results and specifications.
Read about leather area measurement and units. For product specifications or available test documentation, contact Dalir Leather Industry.
