Exolit® 5060 PK
Organic non-halogenated phosphorus flame retardant

Exolit® 5060 PK

Organic non-halogenated phosphorus flame retardant

Edition Date :
October 01, 2020

Clariant´s Exolit 5060 PK is an organic non-halogenated phosphorus flame retardant, especially designed for incorporation into viscose fibres. It is supplied as a wet presscake of 2,2'-oxybis [5,5-dimethyl-1,3,2-dioxaphosphorinane]-2,2'-disulfide.

  • Highly stable in acidic and basic media as well as redox active conditions
  • Alkylphenol ethoxylate-free
  • Low impact on fibre production and viscose processing
  • Special adaptations of the spinning process are not required
  • Low impact on whiteness and light stability of treated textiles
  • No negative impact on post-treatment procedures, including dyeing
  • Hardly extracted by washing procedures, even under the demanding conditions of dry cleaning
  • Non-halogenated flame retardant with favorable environmental and health profile

For regulatory details such as the classification and labelling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet.

May cause long term adverse effects in the aquatic environment.

Status under Food Legislation 
Cannot be used in direct food contact application.

Ecological and Toxicological Properties 

  • Acute toxicity : LD50 dermal : > 5000 mg/kg (rat).
  • Acute toxicity : LD50 oral : > 5000 mg/kg (rat).
  • Irritation : skin (rabbit) : non irritant; eyes (rabbit) : non irritant.
Characteristics Unit Target Value Test Method
Appearance White presscake Visual
Content Active Substance  %   min. 98   QC 999-1578
Dry Content % min. 65   QC 999-1578
Oily Substances % max. 0.5   QC-999-1578 
Pyridine Content            mg/kg max. 100   QC 024-0012    
Exolit 5060 PK is a non-halogenated flame retardant which is preferably used for viscose fibres.
Delivery Form

Plastic drums
open Top 128 L (70 kg)
Pallet 350 kg (5 drums)

The product should be stored dry and at room temperature.
Products that offer outstanding sustainability advantages are awarded Clariant’s EcoTain® label. EcoTain® products significantly exceed sustainability market standards, have best-in-class performance and contribute overall to sustainability efforts of the company and our customers. Find out more about: EcoTain®.
  • Reduced emissions of flame retardant material during use due to incorporation into fiber
  • Contributes to saving lives and assets as a flame retardant
  • Phosphorus is on the EU list of critical raw materials, however, recycling is possible and actively investigated
  • Application of flame retardant viscose enables use of renewable raw materials (cellulose from wood) for protective garments
  • Can be applied during fiber production and thus ensures increased material efficiency due to incorporation into the viscose fiber
  • Reduced waste in production through high yield and recycling of raw materials
  • Drop-in solution for viscose process



  • Complies with fire safety standards such as DIN 4102-1, class B2
  • Constant high quality and hydrolytic stability
  • Supports the attainability of eco-labels for customer products
  • Wearing comfort is improved by the application of viscose garments with Exolit 5060 PK versus other materials
  • Long lasting flame retardancy effect and washing resistance
  • Lower influence on whiteness of fibers and higher light stability compared to polyaramid fibers

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SDS Exolit® 5060 PK

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Alexis Dudley
Alexis Dudley
Contact Person

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This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application.<br />
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