Sulfonium Series

CPI®-100 / 200series UV
UV light / i-line

CPI-100P(liquid)
CPI-110P(powder)
CPI-100B(40)(liquid)
CPI-110B(powder)
CPI-101A(liquid)
CPI-200K(liquid)
CPI-210S(powder)
cation
(light-absorbing site)

CPI®-300series
i-line

CPI-310FG(powder)
CPI-310B(powder)
cation
(light-absorbing site)

VC-1 VC-2 Series (development product)
i-line

VC-1FG(powder)
cation
(light-absorbing site)

CPI®-400series
g-line / h-line/ i-line

CPI-410S(powder)
CPI-410B(powder)
cation
(light-absorbing site)

ES-1 (development product)
ES-2 (development product)
g-line / h-line/ i-line

ES-1B(powder)
ES-2B(powder)
cation
(light-absorbing site)

Photoacid Generator(Iodonium)
IK Series

IK-1(powder)
IK-1FG(powder)
cation
(light-absorbing site)

IK-20B(powder)
cation
(light-absorbing site)

Nonionic Photoacid Generator

NAseries
(development product)
i-line compatible

NA-CS1(powder)
Aryl amide skeleton with
a light-absorbing moiety

Thermal acid generator

Thermal acid generator(Overview and Function Map)

TA Series(Sulfonium Salt Type)

TA-100(powder)
TA-100FG(powder)
cation

IKseries(Iodonium Salt Type)

IK-1(powder)
IK-1FG(powder)
cation

AAseries(Ammonium Salt-Type)

AA-01(powder)
cation

IK-20B(powder)
cation

Thermal Base Generators

DBU Salt Thermal Base Generators

DBU Salt

U-CAT SA 1(liquid)
U-CAT SA 102(liquid～solid)
U-CAT SA 603(solid)
U-CAT SA 810(solid)
U-CAT SA 506(liquid～solid)

Ammonium Salts

U-CAT 18X(liquid～solid)

Innovator of fine chemicals that create high added value

SAN-APRO

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Image of photoacid generators and thermal acid generators also used in semiconductors

Image of photoacid generator and thermal acid generator materials used in smartphones

Image of photo-acid generators and thermal acid generators also used in the field of chemical research

San-Apro Ltd.'s photoacid generators
and organic strong basesare used in many places close to you.

painting materials

Coating agents

3D printers

Semiconductors

Displays

Pharmaceuticals

The photoacid generators handled by San-Apro decompose when exposed to light, generating acid. Thermal acid generators decompose when heated, generating acid. Strong basic organic compounds are used in many applications, with their basicity being so strong that they can be used in place of sodium hydroxide. We contribute to the creation of products around the world by making the most of these chemical characteristics.

Consultation Process

We also accept consultations on product development using photoacid generators, thermal acid generators, strong basic organic compounds, and thermal base generators, so please feel free to contact us. Inquiries about samples* are also accepted below.

Sample Consultation※
Free samples of photoacid generators have been discontinued. Please purchase the products as reagents.
Product Inquiries
Technical Consultation
Other Inquiries

Products info

San-Apro was the first company in the world to successfully industrialize strong basic organic compounds DBU in 1967. We are developing products that meet all kinds of needs, including photo acid generators, thermal base generators, thermal acid generators, and super strong bases.

Photoacid Generator(Photo-initiator for cationic polymerization)

CPI® Series,IK Series Acid generator/UV

The “CPI® and IK Series” are triaryl sulfonium salt-type photoacid generators (photo-initiators for cationic polymerization) manufactured using our own proprietary production method. While conventional products contain large amounts of bis-sulfonium salts, the CPI® and IK Series have high purity monosulfonium salts, so they have excellent solubility in organic solvents and matrix resins, and they have excellent one-component storage stability in cationic polymerizable compositions such as epoxy resins

List of Photoacid Generators Acidity/Recommended Wavelength Function MAP

Heat base generator

U-CAT SA®, U-CAT®series Base generator/Heat

DBU®, DBN There are products that have been given heat latent properties by combining them with various organic acids. Please select the most suitable product according to your intended use.

Thermal base generator
Product list

Heat acid generator(Heat cationic polymerization initiator)

TA, IK, AA series Acid generator/Heat

They are used in thermal cationic curing adhesives and coatings in the fields of electronic materials and optical materials. In addition to being highly active, we are also developing our own original products with even higher functionality.

List of thermal
acid generators Acidity/recommended
temperature function map

Super Strong Base

DBU® and DBN Super Strong Base

DBU® and DBN are organic compounds that exhibit extremely strong basicity. They are highly compatible with various solvents and are useful as catalysts for many organic synthesis reactions. They can be used to improve reaction yield and selectivity under milder conditions than those required for conventional tertiary amines or inorganic basic catalysts. They are also used as catalysts for various polymerization and cross-linking reactions.

List of Super Strong Base

Technical Information

We provide technical information from San-Apro for technical support and joint research. We will propose solutions to your problems from various angles based on the extensive experience of our engineers.

List of
Technical Information

PDF of materials distributed at exhibitions

You can download PDF files of materials distributed at exhibitions held by San-Apro Co., Ltd. PDF Japanese only

Open PDF List

PDF_Photoacid Generator 1(900KB)

PDF_Sulfonium Salt Photoacid Generator 2(1425KB)

PDF_Sulfonium Salt Photoacid Generator 2(1,426KB)

PDF_Nonionic Photoacid Generators (964KB)

PDF_Thermal Acid Generators (1037KB)

PDF_DBU (935KB)

PDF_Thermal base generators (989KB)

PDF_Future Materials (994KB)

In recent years, there has been a worldwide tightening of regulations on per- and polyfluoroalkyl substances (PFAS), and we are focusing on the development of PFAS-free products to ensure that our customers can use them with peace of mind. Please also make use of our existing lineup of PFAS-free products.
*PFAS: OECD definition published in2021