Difference Between DEHT and DEHP | Compare the Difference
The key difference between DEHT and DEHP is that DEHT is a non-phthalate plasticizer, whereas DEHP is a phthalate plasticizer. Besides, the structural difference between DEHT and DEHP is that DEHT has its carboxylate groups at the para position of a benzyl ring while DEHP has its two carboxylate groups at the ortho position of a benzyl ring.
Plasticizers: What is the difference between DEHT and DEHP
DEHT and DEHP are structural isomers: DEHT is a 1,4-benzenedicarboxylic isomer (para position=terephthalic acid), while DEHP is a 1, 2-benzenedicarboxylic acid (ortho position = phthalic acid) esterified with 2-ethylhexanol.
Classification of plasticizers - Oxoplast
DEHT can easily replace higher and lower ortho-phthalate plasticizers. It has very good physical and chemical properties compared to other plasticizers. Due to its functional parameters, it easily blends in with the specific applications currently reserved for the mass-produced DINP and DEHP plasticizers.
DEHT is a suitable plasticizer option for phthalate-free
Di (2-ethylhexyl) terephthalate (DEHT) provides sufficient red blood cell (RBC) quality during conventional blood bank storage. It is important that a new plasticizer also maintains acceptable quality during exposure to high cell stress, such as irradiation, which is commonly used to prevent graft-versus-host disease.
Bis(2-ethylhexyl) phthalate
DEHP is the most common phthalate plasticizer in medical devices such as intravenous tubing and bags, IV catheters, nasogastric tubes, dialysis bags and tubing, blood bags and transfusion tubing, and air tubes. DEHP makes these plastics softer and more flexible and was first introduced in the 1940s in blood bags.
- Is DEHT a good plasticizer?
- DEHT can easily replace higher and lower ortho-phthalate plasticizers. It has very good physical and chemical properties compared to other plasticizers. Due to its functional parameters, it easily blends in with the specific applications currently reserved for the mass-produced DINP and DEHP plasticizers.
- Why is DEHP used as a plasticizer?
- Due to its low cost and generally good performance, DEHP is widely employed as a plasticizer in manufacturing articles made of PVC. Melting point: −50°C Boiling point: 250 - 257°C at 0.5 kPa DEHP offers good gelling, satisfactory electrical properties and helps to produce highly elastic compounds with reasonable cold strength.
- Is DEHT better than DEHP?
- While DEHT exhibits lower toxicity compared to DEHP, studies suggest the need for further research to fully understand its impact. Environmental considerations also encompass DEHT’s biodegradability and ecotoxicity, raising questions about its long-term sustainability in various applications. What is DEHP?
- Are there alternatives to DEHP in NICU medical products?
- Availability of DEHP-free alternatives was determined through company websites and phone interviews. Two alternative approaches are available for replacing DEHP in NICU medical products: (1) replacement by DEHP-free plasticizers; and (2) replacement of PVC entirely through the use of other polymers.
- Can a PVC plasticizer reduce DEHP leaching?
- Although DEHP leaching can be decreased or prevented using DEHP-free plasticizers, the lifecycle hazards associated with PVC are not addressed in this method. 13 A second alternative is to replace the PVC entirely through the use of another naturally flexible polymer.
- Can DEHP be used in PVC MDS?
- The use of DEHP in PVC MDs has been called into question by the European authorities and has been restricted for several years. It must now not exceed 0.1% by mass of the plasticized material, as defined by European Regulation n°2017/745 on MDs .
