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Product Overview
TOTM heat-resistant plasticizer with high-temperature stability.
CAS NO:25103-12-2
TOTM features low volatility, low migration, and excellent heat stability, effectively improving the service life and performance retention of flexible PVC materials in high-temperature environments. TOTM is widely used in high-temperature resistant wires and cables, automotive interior materials, industrial hoses, and other demanding flexible PVC products.

Product Parameters

Trade name Triisooctyl trimellitate (TOTM)
Type Plastic Auxiliary Agents, plasticizer
Delivery form Oily liquid
Color index Transparent
CAS No. 25103-12-2
Appearance Transparent, oily liquid without visible impurities
Chroma / (Pt-Co)# ≤ 50
Purity % ≥ 99.5
Flash point (open)℃ ≥ 240
Density (ρ20)g/cm³ 0.984-0.991
Acidity (as phthalic acid) % ≤ 0.15
Moisture % ≤ 0.1
Volume Resistivity (20℃,Ω·cm)≥ 5×10¹¹
Sales packing 200KG/ iron drum,1000KG/IBC tank, 23tons/Flexitank /20GP.
Storage Stored in a cool, ventilated warehouse, away from fire, heat. with oxidants, acids stored separately, avoid mixed reservoir. Equipped with the appropriate variety and quantity of fire equipment. Storage area should be equipped with emergency response equipment and appropriate shelter materials. Shelf life 12 months.

Features

Excellent heat resistance

It exhibits excellent long-term high-temperature resistance and is suitable for high-temperature application environments.

Low volatility

It helps reduce weight loss, fogging, and surface contamination during long-term heat exposure.

Low migration stability

It can support a longer product life when in contact with oils, heat sources or external media.

Good electrical insulation properties

Suitable for wire and cable formulations, insulation materials, and electrical components.

Weather resistance stability

It exhibits stable performance in outdoor or enclosed high-temperature conditions, making it suitable for applications that prioritize anti-aging properties.

Recommended Solutions

Frequently Asked Questions

TOTM’s core advantage is long-term stability rather than plasticizing efficiency. Compared with DOTP and DINP, it offers better high-temperature performance, low volatility, low migration, and resistance to oil extraction, making it especially suitable for long-service applications such as cables and automotive wiring harnesses.

TOTM is a trimellitate ester plasticizer with high molecular weight and low volatility, enabling stable performance at elevated temperatures. Compared with common phthalate plasticizers, it offers better heat-aging resistance, extraction resistance, migration resistance, and long-term electrical performance. It is commonly used in 105°C and higher-rated cable compounds, automotive wiring harnesses, and high-temperature flexible PVC products.

TOTM is widely used in automotive interiors and cables because these applications are exposed to high temperatures and enclosed environments, requiring low VOC emissions, low fogging, and strong aging resistance. Its low volatility, low migration, and excellent thermal stability help reduce exudation, fogging, and performance degradation, making it suitable for automotive instrument wiring harnesses, cable sheaths, and sealing strips.

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