>  Topics > Restriction > Substance Restriction in Articles


Restriction of D4 and D5 in Personal Care Products

By Little Pro on 2017-09-15 Views:  Update:2017-10-12

Octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) will be added to REACH annex XVII restricted substances list very soon. In this article, we will give you a summary of why they are restricted and what proposed conditions of restrictions are. 

Why Are D4 and D5 Restricted?

D4 and D5 are cyclosiloxanes mainly used as monomers for silicone polymer production. They also have a direct use in personal care products. D4 has been identified as a persistent, bioaccumulative and toxic (PBT) and very persistent very bioaccumulative (vPvB) substance. D5 has been identified as a vPvB substance.

Due to concerns that D4 and D5 may have the potential to accumulate in the environment and cause effects that are unpredictable and irreversible in the long-term, ECHA’s Risk Assessment (RAC) and Socio Economic Assessment (SEAC) Committees agreed with the UK’s proposal to restrict D4 and D5 in wash-off personal care products in June 2016 since they may go down the drain and enter lakes, rivers, and oceans. 

Proposed REACH Annex XVII Restriction for D4 and D5

The proposed restriction for D4 and D5 under REACH annex XVII is listed as follows. The restriction has not come into force yet. 

Substance Conditions of Restriction


EC number: 209-136-7, CAS number: 556-67-2


 EC number: 208-746-9, CAS number: 541-02-6

1. Shall not be placed on the market or used in concentrations equal to or greater than 0.1% by weight of each in personal care products that are washed off in normal use conditions.

2. Personal care products shall be taken to mean any substance or mixture intended to be placed in contact with the various external parts of the human body (epidermis, hair, nails, lips and external genital organs) or with the teeth and the mucous membranes of the oral cavity with a view exclusively or mainly to cleaning them, perfuming them, changing their appearance and/or correcting body odours and/or protecting them or keeping them in good condition.

3. Normal use may be determined by packaging instructions, indicating the purpose of the product and how it is to be used.

4. This restriction shall come into force on DD/MM/YY [at least 2 years after publication in the Official Journal].

5. By DD/MM/YY [ten years after entry into force] the Commission shall carry out a review of the other sources of these substances to investigate whether any further emission reduction measures are necessary. On the basis of this review, the Commission shall, if appropriate, present a legislative proposal to extend the restrictions in paragraph 1.

Restricted Use of D4 and D5 in Other Products?

ECHA is working on an additional proposal to restrict D4 and D5 in leave on personal care products and other consumer/professional products (e.g. dry cleaning, waxes and polishes, washing and cleaning products). The proposal will be submitted for approval in April 2018. Industry has expressed strong objections to this additional restriction.



 Tags: Topics - RestrictionSubstance Restriction in Articles

Sponsored Content

Related Topics