OEKO-TEX STANDARD 100 Class IV and Flame Retardants

OEKO-TEX STANDARD 100 and Utilization Category IV Definition

OEKO-TEX STANDARD 100 is an independent certification system under which textiles from yarns to finished articles are tested for harmful substances [1], [6]. As explicitly articulated in the standard document, STANDARD 100 is not a certificate of quality or a general sustainability guarantee; it certifies that the article has been audited for chemical residues harmful to human health [1].
The STANDARD 100 system divides articles into four distinct classes according to their level of contact with the consumer [1]. Decoration products such as curtains, table cloths, upholstery and wall coverings are certified under Product Class IV [1].

Evaluation of Flame Retardant Chemicals and Annex 5 Bans

The evaluation of flame retardant chemicals does not constitute a separate standard for Class IV, but is governed by uniform rules across all classes throughout STANDARD 100 [1], [3]. The flame retardant active product used must have been evaluated and accepted in advance by OEKO-TEX [1].
The standard does not prohibit all halogenated or brominated compounds, but bans specific substances listed in Annex 5 [1], [3]. This list encompasses PBB, PBDE, HBCDD, TBBPA and TCEP [2], [3].
For chlorinated paraffins (SCCP and MCCP), a combined threshold value of 50 mg/kg is enforced [3]. Heavy metals are also restricted [1], [3]. Fabrics made of fibers with flame retardant properties can also obtain STANDARD 100 certification [1].

Certification Process, Audits and Verification Steps

Testing is conducted at authorized OEKO-TEX institutes such as Hohenstein [4]. Certificates issued upon testing remain valid for 1 year [1], [5]. Laboratory testing is repeated upon renewal [1], [5].
OEKO-TEX criteria fulfill REACH requirements [6]. Validity of the certificate can be audited online via the OEKO-TEX verification portal using the QR code or certificate number on the label [6].