 Home > Industrial Coatings > Coating Additive > Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate for Sale > UV Photoinitiator TPO-L, Liquid Phosphine Oxide Photoinitiator Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate for UV Curing Coating & Ink

UV Photoinitiator TPO-L, Liquid Phosphine Oxide Photoinitiator Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate for UV Curing Coating & Ink

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Unit Price:

$16.5-21.3/KG EXW

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CAS No.:

84434-11-7

Grade:

Industrial Grade

Content:

99%

Packaging:

1kg/Bottle;20kg/Drum;25kg/Drum

Price valid (until):

2026-11-23

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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
Inquiry History

Description

Photoinitiator TPO-L is a liquid Norrish Type I photoinitiator based on the phosphine oxide family, with CAS No. 84434-11-7. It is specifically designed for UV-curable systems where high curing efficiency, low odor, low yellowing and low migration are required.

Unlike powder-type initiators such as TPO, TPO-L is supplied as a light yellow viscous clear liquid. This liquid form simplifies handling and dosing, improves dispersion and dissolution in monomers and oligomers, and delivers fast, reliable curing under both conventional mercury lamps and LED UV systems.

Typical Specifications

Item	Standard
Appearance	Light yellow viscous clear liquid
Purity	≥ 98.0%
Clarity	Clear
Acidity Value	≤ 1.0 mg KOH/g
Molecular Formula	C₁₈H₂₁O₃P
Molecular Weight	316.33
CAS No.	84434-11-7
EINECS No.	282-810-6

Applications

TPO-L is widely used in the following UV-curable fields:

Screen printing inks, flexographic inks and lithographic/offset printing inks
UV-curable coatings and varnishes
Photoresists and printing plates
UV adhesives and LED UV curing systems
Formulations requiring low odor, low yellowing and low migration performance

Advantages

Liquid form: easy dosing, good solubility and uniform dispersion
Fast initiation and high curing efficiency, including LED UV compatibility
Low odor and low yellowing for demanding printing and coating applications
Low migration profile, ideal for sensitive applications

Packaging & Storage

Standard package: 20kg/drum &25 kg/drum; other packaging options available on request
Store in a cool, dry, well-ventilated place, away from direct sunlight and heat; keep container tightly sealed
Handle away from ignition sources; refer to the SDS for detailed safety information

About Our Supply

We are a professional chemical raw material trading company offering a complete range of UV photoinitiators — including 184, TPO, TPO-L, MBP and more — as a one-stop supply source. With stable inventory across multiple warehouses and flexible order/packaging options, we support consistent delivery and export logistics for international buyers, backed by responsive technical support to help you select the right photoinitiator for your formulation.

Basic Info

Product Name:

Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate

Other Name:

Phosphinic acid,P-phenyl-P-(2,4,6-trimethylbenzoyl)-,ethyl ester;Phosphinic acid,phenyl(2,4,6-trimethylbenzoyl)-,ethyl ester;LR 8893X;2,4,6-Trimethylbenzoylethoxyphenylphosphine oxide;Lucirin TPO-L;Lucirin TPO Liquid;Lucirin LR 8893X;TPO-L;Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate;Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate;2,4,6-Trimethylbenzoylphenylethoxyphosphine oxide;JRcure TPO-L;Speedcure TPO-L;Omnirad TPO-L;Darocur TPO-L;Irgacure TPO-L;Photoinitiator TEPO;Doublecure 1256;[Ethoxy(phenyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone;2,4,6-Trimethylbenzoyl-ethoxylphenylphosphine oxide;Omnirad TPO-I;220107-66-4;918301-86-7;1817604-19-5

CAS No.:

84434-11-7

Molecular Formula:

C18H21O3P

InChIKeys:

InChIKey=ZMDDERVSCYEKPQ-UHFFFAOYSA-N

Molecular Weight:

316.33

Exact Mass:

316.33

EC Number:

282-810-6

HScode:

2931900090

Categories:

Coating Additive

Characteristics

PSA:

43.4

XLogP3:

3.9

Appearance:

Yellow liquid

Density:

1.1±0.1 g/cm3

Melting Point:

144.5-147 °C(lit.)

Boiling Point:

456°C at 760 mmHg

Flash Point:

242.9±51.8 °C

Refractive Index:

1.549

See More Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate Properties 

Hazard Identification

Classification of the substance or mixture

Skin sensitization, Sub-category 1B

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 2

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Warning
Hazard statement(s)	H317 May cause an allergic skin reaction H411 Toxic to aquatic life with long lasting effects
Prevention	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P273 Avoid release to the environment.
Response	P302+P352 IF ON SKIN: Wash with plenty of water/... P333+P317 If skin irritation or rash occurs: Get medical help. P321 Specific treatment (see ... on this label). P362+P364 Take off contaminated clothing and wash it before reuse. P391 Collect spillage.
Storage	none
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 Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate 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.

Inquiry History

1 Inquiries

Country	Product	Purchase Quantity	Date Posted
Pakistan	Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate photoinitiator TPO-L	500 KG	Dec 27, 2024

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UV Photoinitiator TPO-L, Liquid Phosphine Oxide Photoinitiator Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate for UV Curing Coating & Ink

Product Details

Seller Information