Yoneyama Kagaku Kogyo Kaisha, Ltd.

Ammonium adipate

Product Features

  • We have the largest share of Japan's capacitor chemical market.
  • Approved quality for capacitor production.
  • Conformable to RoHS regulation (10 substances).
  • Stable quality and supply.
Ammonium adipate



Paper bag of 20 kgs. net


Basic Information

Chemical formula
Specific gravity
About 0.7
36g/100g (20 degree C.)
White powder
Harmonized system (HS code)
Country of origin
UN number


Water solubility
pH (5% liquid)
6.0 - 7.5
Chloride (Cl)
0.5ppm max.
Sulfate (SO4)
10ppm max.
Lead (Pb)
5ppm max.
Iron (Fe)
2ppm max.
99.0% min.

Main Applications

  • Chemical conversion treatment agent for Aluminium foil for Aluminium electrolytic capacitors (surface treatment)
  • Electrolyte for driving capacitors


How do you manage the quality of each production lot?
We manage all manufacturing lots with a process capability index. The quality variation of all shipping lots is controlled within a certain range.

End User Comments

Aluminum electrolytic capacitor manufacturer

“We have been purchasing Yoneyama’s Adipic acid for many years to manufacture aluminum electrolytic capacitors. Yoneyama’s products are stable in supply as well as quality, so we use them with confidence.”

Who manufactures Ammonium adipate?

Yoneyama Kagaku Kogyo Kaisha, Ltd.

Aerial Shoot


  • We have been producing high-performance chemicals using crystallization technology since 1918.
  • We have achieved stable quality because we control the manufacturing process by a quantitative method.
  • We produce phosphates, acetates, chlorides and sulfates which are conformable to the Japanese standards of quasi-drug ingredients typically used for cosmetics, shampoos, body soaps, and hair care products.


1918 Established in Osaka prefecture, Japan.
1962 Ashikaga Plant was created.
1966 Ashikaga Plant starts producing Ammonium acetate.
2001 Company acquires ISO 9001 certification (all business units).

Company Overview (as of March 31, 2020)

Company name Yoneyama Kagaku Kogyo Kaisha, Ltd.
Head office 5-2-18 Nishitenma, Kita-ku, Osaka, 530-0047, Japan
Date of establishment July 10, 1918
Capital JPY 24 million
Number of employees 90
Location Head office: Osaka
Branch offices: Tokyo, Nagoya
Plants: Osaka, Ashikaga
Technical department : Osaka
Affiliates: Suita (Osaka)


Plant location map

Osaka Plant

  • Phosphates
  • Sulfates

Ashikaga Plant

  • Acetates
  • Boric acid
  • Ammonium salts

Other Plants

  • p-Nitrobenzoic acid
  • Zinc sulfate
  • Potassium tetraborate

" End-User’s Laboratory "

Equipment for end-user’s pilot and small-scale production using our excellent crystallization technology


  • Production volume 100 - 1000 kgs.
  • We have facilities that can develop chemicals that meet the standards for reagent special grade, food additives, and capacitors.
  • Using the manufacturing data accumulated in the development process, you can move to mass production accurately and quickly.

Main Equipment

Device Name Capacity Quantity Material made of Comment
Feed tank 3,000 L 1 GL Room temperature to 120 degree C., full vacuum to atmospheric pressure
3,000 L 1 SUS Room temperature to 120 degree C., full vacuum to atmospheric pressure
Crystallization tank 3,000 L 1 SUS Room temperature to 120 degree C., full vacuum to atmospheric pressure
Filter 250mm x 5 1 SUS Cartridge type
80 L, 0.2 m2 1 SUS Nutsche type
Centrifuge 42 inches, 165 L 1 SUS Fully open, bottom ejection type
Conical dryer 300 L 1 SUS 40 to 120 degree C., full vacuum to atmospheric pressure
Loading chamber 18 m2 1 SUS Positive pressure control, HEPA filter
Kneader 50 L 1 SUS Room temperature to 120 degree C., full vacuum to atmospheric pressure

Case Study

1. Purification of water-soluble compounds

This labo's purification process removes impurities and provides them to users in pharmaceutical applications who require high purity products. "Purification of water-soluble compounds" is our specialty, and we often undertake requests for such purification in small lots (100 - 500 kgs.).

2. Purification and reduction of Fe of ammonium organic acid for plating

We have reduced impurities in ammonium organic acid, which is used as a complexing agent and buffer, by an impurity removal process + neutralization reaction + crystallization method. As a result, we are able to crystallize "high purity" and "low Fe value" crystals.