 Home > Industrial Coatings > Coating Additive > (2,4,6-Trimethylbenzoyl)diphenylphosphine oxide for Sale > UV Photoinitiator TPO, CAS 75980-60-8, Diphenyl(2,4,6-trimethylbenzoyl)phosphine Oxide

UV Photoinitiator TPO, CAS 75980-60-8, Diphenyl(2,4,6-trimethylbenzoyl)phosphine Oxide

Unit Price:

$13-15/KG EXW

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CAS No.:

75980-60-8

Grade:

Industrial Grade

Content:

99%

Packaging:

1kg/bag;20KG/Carton

Price valid (until):

2026-11-22

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Guangzhou Yano Chem

Company Type:

Trader

Location:

China

Payment Terms:

TT against B/L draft before shipment,100% TT in advance

Qualification:

Main Products:

UV photoinitiator,resin,carbon black,kaolin clay,filler

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Product Details
Seller Information

Description

✨ Product Overview Photoinitiator TPO, Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, is a phosphine oxide type free radical photoinitiator. Different from conventional α-hydroxyketone initiators, it has an extended UV absorption range reaching the UVA region, making it a preferred choice for LED-UV curing formulations.

It delivers remarkable deep curing capacity in TiO₂-containing white inks and thick pigmented coatings. Low odor after curing and good compatibility with acrylate oligomers and monomers. We are a supplier of UV curing raw materials with steady stock. Sample service and bulk supply are available. TDS, SDS and export documents can be provided.

📋 Specifications

Item	Specification
Chemical Name	Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide
Synonyms	Lucirin TPO, Omnirad TPO
CAS No.	75980-60-8
EINECS No.	278-355-8
Molecular Formula	C₂₂H₂₁O₂P
Molecular Weight	348.37
Appearance	Pale yellow crystalline powder
Purity	≥99.0%
Melting Point	90–94℃
Loss on Drying	≤0.5%
Ash Content	≤0.1%
UV Absorption Peak	267 nm, 298 nm, 380 nm
Recommended Dosage	1–4% by weight, usually blended with other photoinitiators

🎯 Applications

White TiO₂ UV screen ink, offset ink, inkjet ink
LED-UV wood and plastic thick film coatings
3D printing photoresin, UV adhesive, optical fiber coating
Pigmented UV varnish, photocurable composite material

📦 Packing & Storage

Standard package: 25kg fiber drum with inner PE bag, customized packing acceptable
Storage: Keep sealed in cool and dark place, away from heat and strong oxidants
Transport: General chemical goods, avoid prolonged direct sunlight

🏆 Our Service

Wide range of UV photoinitiators in stock for one-stop purchase
Multi-warehouse shipment, EXW / FOB / CIF trade terms available
Samples for formulation testing, TDS, SDS and customs documents support
Rich experience in UV curing industry, formulation blending suggestion available

ECHEMI Editorial Reference

white or cream powder
DryPowder; Liquid; OtherSolid; PelletsLargeCrystals, Liquid

Basic Info

Product Name:

(2,4,6-Trimethylbenzoyl)diphenylphosphine oxide

Other Name:

Methanone,(diphenylphosphinyl)(2,4,6-trimethylphenyl)-;Phosphine oxide,diphenyl(2,4,6-trimethylbenzoyl)-;(Diphenylphosphinyl)(2,4,6-trimethylphenyl)methanone;Lucirin LR 8728;Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide;(2,4,6-Trimethylbenzoyl)diphenylphosphine oxide;Lucirin LR 8893;Lucirin 8893X;Chivacure TPO;Irgacure TPO;Photocure TPO;Darocur TPO;Speedcure TPO;L-TPO;Lucirin TPO Solid;Lucirin TPO-X;TPO-X;Genocure TPO;Lucirin TPO;Lucirin LR 8953;TPO;Esacure TPO;D-TPO;UV-Cure APO;Lucirin LR 8953X;Doublecure TPO;Chemcure TPO;DCTPO;TPO 173;Genocure LTM;D 3358;Micure TPO;Additol TPO;Ciba TPO;Irganox 819;Omnirad TPO;JRCure 1108;I-TPO;Diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide;IHT-PI TPO;Photoinitiator TPO;JRcure TPO;Genocure TPO-L;Lunacure TPO;IGR 819;Omnirad TPO-H;Ryoji TPO;2,4,6-(Trimethylbenzoyl)diphenylphosphorus oxide;(Diphenylphosphoryl)(mesityl)methanone;SB-PI 718;LR 8953;Gencure TPO;OR TPO-H;UV-Cure TPO;Daido UV-Cure TPO;IGM TPO;TPO-H;Kaiji 3033A;3033A;596818-40-5;743458-22-2;1004988-40-2;1266684-52-9;1629246-19-0

CAS No.:

75980-60-8

Molecular Formula:

C22H21O2P

InChIKeys:

InChIKey=VFHVQBAGLAREND-UHFFFAOYSA-N

Molecular Weight:

348.37

Exact Mass:

348.37

EC Number:

278-355-8

UNII:

B9EIM2D97X

DSSTox ID:

DTXSID4052502

HScode:

2931900090

Categories:

Coating Additive

Characteristics

PSA:

34.1

XLogP3:

Appearance:

DryPowder; Liquid; OtherSolid; PelletsLargeCrystals, Liquid

Density:

1.2±0.1 g/cm3

Melting Point:

88-92 °C(lit.)

Boiling Point:

519.6ºC at 760 mmHg

Flash Point:

>230 °F

Refractive Index:

1.600

See More (2,4,6-Trimethylbenzoyl)diphenylphosphine oxide Properties 

Hazard Identification

Classification of the substance or mixture

Reproductive toxicity, Category 2

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Warning
Hazard statement(s)	none
Prevention	P203 Obtain, read and follow all safety instructions before use. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response	P318 IF exposed or concerned, get medical advice.
Storage	P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More (2,4,6-Trimethylbenzoyl)diphenylphosphine oxide Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
UV photoinitiator,resin,carbon black,kaolin clay,filler

Location:
Room 513, Block A2, Chaolian Building, No. 598 Fushi Road, Dashi Subdistrict, Panyu District, Guangzhou 511430, Guangdong Province, P.R. China

Payment Terms:
TT against B/L draft before shipment,100% TT in advance

Year of Establishment:
2016

The story of Guangzhou Yangnuo New Materials Co., Ltd. begins with a simple conviction born in the port city of Guangzhou: reliable supply matters most. Since our founding, we have served customers in coatings, inks, adhesives, plastics and building materials, supplying UV photoinitiators, resins, carbon black, kaolin, fillers and related chemical materials. From the very beginning, we understood that what customers truly value is not a single transaction, but the assurance that every shipment arrives on time, on spec, and in full. Starting from a single warehouse, we steadily built a multi-warehouse shipping system — a wider product range, ample inventory, and faster response. Today, leveraging South China's convenient port and logistics network, we have grown from serving domestic clients to markets around the world, while keeping that same conviction: stable supply, competitive pricing, and attentive technical support make us a long-term partner our customers can trust. We believe trade is built on trust — and trust is earned every time we deliver on our word.
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UV Photoinitiator TPO, CAS 75980-60-8, Diphenyl(2,4,6-trimethylbenzoyl)phosphine Oxide

Product Details

Seller Information

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

More Choices Find All Products for Sale 

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