Tags

, , ,

Dyes and regulation

In the last month i started to collect the dyes list which are all fullfilling the GOTS and OE standards. After reading many documents and interaction, i obtained a collection of information. So here i am sharing with you. (Many of this given information you can find in the oeko – text blog too)For my query Patty and Leigh Anne Answered:

“There are many, many prohibited dyes. GOTS prohibits the use of all amine releasing azo dyes, for instance. This prohibited category includes the following chemical compounds with their CAR RN (chemical label) :  Azo dyes (Restricted amines – from Azo dyes) 

  • 4- Aminodiphenyl (92-67-1)
  • Benzidine (92-87-5) 
  • 4-Chloro-o-Toluidine (95-69-2) 
  • 2- Napthylamine (91-59-8) 
  • o-Aminoazotoluene (97-56-3) 
  • 2-Amino-4-nitrotoluene (99-55-8) 
  • 2,4 Diaminoanisole (615-05-4)4,4 
  •  Diaminodiphenylmethane (101-77-9) 
  • 3,3-Dichlorobenzidine (91-94-1) 
  • 3,3- Dimethoxybenzidine (o-Dianisidine) (119-90-4) 
  • 3,3- Dimethylbenzidine (o-Tolidine) (119-93-7) 
  • 3,3- Dimethyl-4,4’-diaminodiphenylmethane (838-88-0) 
  • p-Chloroaniline (106-47-8) 
  • p-Cresidine (120-71-8) 
  • 4,4-Methylen-bis-(2- chloroaniline) (101-14-4) 
  • 4,4- Oxydianiline (101-80-4) 
  • 4,4- Thiodianiline (139-65-1) 
  • 2,4- Toluenediamine (95-80-7) 
  • o-Toluidine (95-53-4) 
  • 2,4,5-Trimethylaniline (137-17-7) 
  • o-Anisidine (90-04-0)
  •  p-Amino-azobenzene (60-09-3) 

 There are many other categories of prohibited residues from dyes or from chemicals used in any of the other other production stages. Prohibited residues above a certain threshold using a specified test  include formaldehyde and other aldehydes,  heavy metals,  PVC, organotin compounds, AOX, disperse dyes, and a whole list of other chemicals. This is important because, as you probably know, many of these chemicals, especially the heavy metals, are a component of –  or a mordant or fixative for – dyestuffs.

 In addition, there are requirements that dyestuffs must meet regarding oral toxicity, aquatic toxicity, biodegradability, eliminability and bi-accumulation in fatty tissues.  The GOTS details are on their website:  www.global-standard.org.  Some dyestuff producers advertise that they have a dye group that meets these standards, such as Huntsman and Clariant. As you know, vegetable and natural dyes are often some of the most heinous violators of some of these rules. Natural and vegetable dyes when used with usual mordants, fixatives, etc., are definitely NOT an eco choice.  As you also may know, this list of prohibited chemicals and limited chemical residues will most likely become longer in the coming years with the very important EU REACH legislation. We all suffer from the fact that most chemicals – in fact the vast majority – in industrial use currently have not been tested for aquatic toxicity, oral toxicity – haven’t been tested at all in most cases”.  

Further to this i have uploaded the document which may usefull to use as a guide to proceed with the dyes stuff selection.gots_approved-dyes-list-dec07Updated list of approved dyes list.

 

Advertisements