Commissioned synthesis

What we aspire for is the eco-friendly chemical technology.

We are under an operating agreement with a visitor, perform contracted research, development and manufacture of new materials.

Three Strong point

  • Content of trust

    A wide range of commissioning synthesis from gram weights to ton weights.
    No capital affiliation with major chemical or pharmaceutical companies, which allow us to comply strictly with the confidentially.
    Proposal of literature researches and synthetic schema, and provision of synthesis manuals and synthetic compounds.
    Prompt raw material arrangement from our accumulated domestic and informational information.
    Provision of synthetic technologies such as medicine, various intermediates, various electronic materials, functional fine ceramics materials and functional Pigments. Structure of GMP·corresponding production system of active pharmaceutical ingredients and investigational new drugs. One-time synthesis and continuous production are possible.

  • Production technology

    ● Halogenation (chlorination, bromination) Nuclear halogenation, side-chain halogenation, aliphatic halogenation, acid halide

    ●Friedel-Crafts reaction

    ●Grignard reaction

    ●Acylating reaction

    ●Amino-acid derivative Peptide Synthesis, z(benzyloxycarbonyl)transformation, tert·butoxycarbonyl transformation, active-ester transformation and others.

    ● Low-temperature reaction (possible down to 80 degrees C below zero)

    ●Other various synthesis achievements

  • Quality assurance system

    It is structured by Quality Assurance (QA) Department controlling the whole company and Quality Control (QC)
    Section of each plant is an organization of the QA Dept.
    Our company obtained the certification of ISO9001 in 1998 for the whole company including the factories, sales branches and research institutes and in December 2007 we completed the third review for renewal of ISO9001 version 2000.
    The quality of all our products including commissioned synthetic compounds is controlled by ISO9001.

Development Laboratory

Development Laboratory

Proposals of lab-scale, literature researches, synthetic schema.
Development Laboratory

Junsei Chemical Ibaraki Plant

Production of active pharmaceutical ingredients and food additives by mass production of chemical products and GMP-corresponding facility.

  • [Ibaraki Plant / Reaction tank]

    [Ibaraki Plant / Reaction tank]

  • [Ibaraki Plant]

    [Ibaraki Plant]

  • [Ibaraki Plant]

    [Ibaraki Plant]

  • [Ibaraki Plant / Pilot Reaction tank]

    [Ibaraki Plant / Pilot Reaction tank]

Main facilities
Reaction tank(GL) 10,000L 12units
Reaction tank(GL) 20,000L 1units
Reaction tank(GL) 1,000L 3units
Receiver(GL) 800~15,000L 16units
Reaction tank(SUS316)
※first class pressure vessel high temperature(250℃)
10,000L 2units
Receiver(SUS316) 8,000L 2units
Reaction tank(SUS316) 10,000L 1units
Condenser(SUS) 4㎡~15㎡ 7units
Condenser(Carvent) 5㎡~30㎡ 16units
Filtration(SUS) 1㎡~10㎡ 4units
Centrifuge 48in. 3units
60in. 1units
Dryer Conical dryer(GL) 150L 1units
4,000L 3units
6,000L 1units
Clean room class 100,000 2rooms
Gas chromatography 4
Liquid chromatography 9
Fourier transform infrared spectrophotometer 1
Spectrophotometer 1
Viscometer 1
Viscometer B-type 1
pH meter 1
NMR Particle(0.02-700μm) 1
Automated melting point system 1
Density meters and specific meters 1
Automatic titrator 1
Stability chambers 3
Karl Fischer 2
Electric furnace 1

Saitama Plant

One-time synthesis and continuous production are possible.
Consideration for the scale-up to connect to Okuma Plant.
Production of active pharmaceutical ingredients and investigational new drugs.

  • [Saitama Plant / Clean room]

    [Saitama Plant / Clean room]

  • [Saitama Plant / Production facility]

    [Saitama Plant / Production facility]

  • [Saitama Plant]

    [Saitama Plant]

  • [Saitama Plant]

    [Saitama Plant]

Production Department
Production technology Section
Lab scale-500L reaction scale
1,000L-4,000L reaction scale
Production by multi facilities
Scale-up consideration by pilot facility
GMP facility
Main facilities
Reaction tank(GL) 30~4,000L 37units
Reaction tank(SUS) 30~1,500L 8units
Reaction tank(Hastelloy) 150~1,000L 3units
Mixing tank(plastic) many
Centrifuge(SUS) 24~42in. 7units
Filtration 7units
Dryer Conical dryyer(GL) 650~850L 2units
Shelf type(SUS) 2units
Clean room class 100,000 2rooms
Clean booth, clean bench many
Gas chromatography(including capillary-use-only) 7
Liquied chromatography 10
Ion chromatography 5
Gas chromatography mass spectroscope 1
Fourier transform infrared spectrophotometer 1
Spectrophotometer 1
Atomic absorption photometer(frame, non-frame) 2
ICP mass spectroscope 1
ICP emission spectrophotometer 1
Polarimeter 1
NMR(300MHz) 1
Particle size distribution measuring instrument(Micro Truck) 1
Surface area measuring instrument 1
Karl Fischer(volume, coulometry, moisture vaporization instrument) 3
Automatic titrator 2
Viscometer(E-type, B-type) 3
Particle counter 1
Automated melting point system 1
pH meter 2
Supersensitive pH meter 2
Gel Permeation Chromatography 2