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Highly stable phosphinate flame retardant

Exolit® OP 1230 Terra

Exolit OP 1230 Terra is a white, fine-grained powder based on an organic phosphinate. The product is non-hygroscopic and it is insoluble in water and organic solvents. Clariant’s Exolit OP flame retardants for polyamides are all based on aluminum diethyl-phosphinate (= DEPAL). The pure substance DEPAL is sold as Exolit OP 1230 and in combination with synergists as Exolit OP 13xx & Exolit OP 14xx types. Exolit OP 1230 is the first non-halogenated flame retardant which can withstand the demanding requirements of this high end segment of engineering plastics.

Exolit OP 1230 Terra is chemicially and from its composition equivalent to Exolit OP 1230, but comes with a mass balance certificate as for its production, renewable based Ethylene was sourced.

Therefore we assume that for Exolit OP Terra products no additional performance testing and qualification compared to the standard grade are necessary. 

For more details see our Innovation Spotlight video.

  • Non-hygroscopic, insoluble in water and organic solvents
  • Good hydrolysis resistance
  • Suited as flame retardant for thermoplastics and thermosets
  • High efficiency due to its high phosphorus content
  • UL 94 V-0 rating down to 0.4 mm thickness
  • Suited for processing temperatures up to ~ 330 °C
  • Suitable for both glass fiber reinforced and unreinforced grades
  • The flame retardant polyamide compounds exhibit very good physical and excellent electrical properties
  • Suitable for lead free soldering
  • Good colorability
  • Low material densityNon-halogenated flame retardant with favorable environmental and health profile
  • 100% of carbon content are by mass balance certificate from renewable resources
  • Renewable resources are non-food competing
  • Usage of renewable raw material is certified by supplier following the mass balance principle
Characteristics  Unit   Target Value   DS¹)TD²)Test Method 
Phosphorus  %(w/w)   23.3 - 24.0  

Photometry after oxidizing dissolution; (11/17) or wavelength dispersive X-ray fluorescence spectrometry; (11/23)  
Water / Moisture  %(w/w)   max. 0.2  

Thermogravimetry; (11/03)  
Density  g/cm³   1.35  

at 20 °C  
Bulk Density  kg/m³   400 - 600  

Decomposition Temperature  °C   > 300  

Average Particle Size (D50)  µm   20 - 40  

¹) Delivery specification: The product is monitored on a regular basis to ensure that it adheres to the specified values. Test methods: Clariant method numbers 11/xx in brackets.
²) Technical data: The technical data are used solely to describe the product and are not subject to regular monitoring.  


Exolit OP 1230 Terra is suited as flame retardant for thermoplastics and thermosets. Due to its high phosphorus content the product is distinguished by a high efficiency.

Exolit OP 1230 Terra can even be applied in high temperature polyamides because of its high temperature stability. It is suitable for both glass fibre reinforced and unreinforced grades. The flame retardant polyamide compounds exhibit very good physical and electrical properties.

In high temperature polyamides of PA 6T/66 type, a dosage of approx. 15% (by wt.) Exolit OP 1230 Terra  is usually sufficient to obtain the UL 94 V-0 classification for electrical compounds (down to 0.4 mm thicknesses). Subject to the polymer grade, processing conditions and glass fibre reinforcement the dosage of the flame retardant may vary.

Before incorporating Exolit OP 1230 Terra, it is important to pre-dry the polymer as usual. If possible, the resulting moisture content should be below 0.1% (by wt.) for high temperature polyamides, 0.05% (by wt.) for PBT and 0.005% for PET. Pre-drying of Exolit OP 1230 Terra is not necessary. However, pre-drying (e. g. 4h at 120 °C) is recommended, if even very low moisture contents must be avoided.

Wear and corrosion protected materials are recommended for compounding and injection-molding of Exolit OP 1230 Terra in reinforced polyesters, high temperature polyamides, or aromatic polyamides.

The mixing and processing methods customary in powder processing of polymers can be used with Exolit OP 1230 Terra.

The VDI Guideline 2263 “Prevention of dust fires and dust explosions” or the relevant national regulations must be observed. The optimum conditions for incorporating should be determined in each individual case. Care must be taken to ensure homogeneous dispersion of all components. The temperature of the polymer melt should not exceed 330 °C.

Packaging and Handling

Delivery form
White powder

Exolit OP 1230 Terra is delivered in 20 kg paper bags with PE inliner.

For regulatory details such as the classification and labelling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet. The product should be stored in tightly closed packaging in a dry place at room temperature.

Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.

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®.

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