1956 - A hydrogen peroxide plant, the first in India based on the electrolytic process was set up by the Company at Wadala, Mumbai, with a licensed capacity of 720 tonnes per annum of 35% by weight hydrogen peroxide, i.e., 252 tonnes of 100% hydrogen peroxide.

1960 - The manufacturing range at the Wadala plant was extended by establishing a plant for the manufacture of sodium perborate with a capacity of 500 tonnes per annum.

1962 - The hydrogen peroxide plant at Wadala was further expanded to an annual capacity of 1,050 tonnes to 100% hydrogen peroxide.

1966 - 7,200 bonus shares issued in prop. 1:5.

1969 - 9,600 bonus shares issued in prop. 2:9.

1970 - In June, Laporate Industries merged its peroxide interests with Solray et Cie, Belgium. With this merger, Solray also became a shareholder of the Company.

1972 - The Company entered into a Licence Agreement dated 2nd November, with Laporate for the manufacture of 2,500 tonnes per annum of 100% hydrogen peroxide by the auto-oxidation process.

1973 - 24,640 right equity shares issued in prop. 7:15 in October.

1978 - 77,440 bonus shares issued in prop. 1:1.

1980 - A Research and Development Centre (R & D Centre) was established.

1981 - The R & D centre was accorded recognition by the Department of Science and Technology, Government of India. Considerable new equipments and activities were added during the year.

1982 - Letter of Intent was received for expanding the capacity from 6,000 tonnes to 12,000 tonnes per annum of 35% hydrogen peroxide. Steps were taken to set up the expansion project at the existing site of its hydrogen peroxide plant at Kalyan. The design and engineering packages for this project were provided by Laporate Industries. The plant was commissioned during 1988.

- In order to ensure self-sufficiency in the supply of hydrogen, it was decided to set up an integrated hydrogen plant.

- Production of hydrogen peroxide declined due to reduced demand, erratic and irregular supply of hydrogen gas and labour problems at the company's plant.

- The domestic sales of hydrogen peroxide reduced substantially due to the prolonged textile strike and power cuts in the states of Karnataka, Gujarat and Tamil Nadu.

- Letter of Intent was received for the manufacture of 4,000 tonnes per annum of plastic additives. A project for the manufacture of plastic additives was proposed to be established at Dewas in Madhya Pradesh.

- The R & D activities continued to expand. One of the notable achievements during the year was the development and commercialisation of a process for cold bleaching for textile using hydrogen peroxide. Significant progress was also made in promoting the use of hydrogen peroxide in newsprint plants.

1983 - A letter of Intent was received to set up a plant with 6 million cubic metres per annum hydrogen capacity. The plant was to be set up at Kalyan, the existing location of the Company's hydrogen peroxide plant. Humphreys & Glasgow consultants Pvt. Ltd. was appointed consultants for providing consultancy service related to engineering, procurement, construction, supervision and commissioning assistance for the complete hydrogen plant. It was commissioned during 1986-87.

- A Collaboration agreement was finalised with Arugus Chemicals Division of Witco Chemical Corporation, USA. Site for this project was acquired. Various other matters relating to financial and engineering aspect were progressing satisfactorily.

- The Company lost production for 4 months due to non-availability of hydrogen gas as a result of suspension of operations by the suppliers on account of lockout at their plant.

- The activities continued to expand in the areas of product and process research. Favourable results were obtained in field trials with clacium peroxide coated rice seeds. Work was also undertaken on the development of inexpensive solar water heater systems using easily available materials.

- The manufacturing activities had to be completely stopped from November due to lock-out at the National Rayon's plant. The working resumed only in March 1985 when the Company started to receive supply of hydrogen from Standard Alkalies.

1984 - With a view to expanding the manufacturing capacity to 4,200 tonnes per annum of 100% hydrogen peroxide, the company entered into a Supplemental Licence Agreement with Laporate and Solray and an Engineering Services Agreement with Laporate, both the agreements dated 13th May.

- Under the Engineering Services Agreement, Laporate was to provide all kinds of technical assistance in the areas of designing, construction and commissioning of the expanded hydrogen peroxide plant.

- The Company entered into a Licence Agreement dated 9th April, with Argus Chemical Corporation U.S.A. (Argus), for the manufacture of plastic additives.

1985 - During March, the company issued 75,000 No. of equity shares of Rs.100 each at a prem. of Rs.220 per share linked with 3,35,000 - 13.5% secured non-convertible debentures of Rs.100 each at par. Out of the total issue:

- (i) 14,598 No. of equity shares reserved for preferential allotment to the company's foreign shareholders/collaborators;

- (ii) 3,020 No. of equity shares linked to 16,750 debentures were reserved for preferential allotment to the employees of the company and - (iii) 57,382 No. of equity shares linked to 3,18,250 debentures were offered for public subscription.

- The objects of the issue of equity shares and debentures in March were: - (i) To enable the company to have its equity shares and debentures listed on Stock Exchanges.

- (ii) To provide part of the funds required for the Company's programme of expansion of hydrogen peroxide manufacturing capacity and financing the hydrogen gas project and

- (iii) To meet part of the working capital requirements for the existing operations.

1986 - Process know-how was developed for a number of products to be included in the production range of plastics and additives.

- 75,000 No. of equity shares issued (prem. Rs.220 per share) linked to debentures; 7,300 No. of equity shares to Laporate Chemicals Ltd. U.K. and 7,298 No. of equity shares to Solvay at Cie, S.A. Belgium were reserved and allotted; 3,020 No. of equity shares linked to debentures were reserved and allotted to employees (not related to directors or to directors of interconnected undertakings) of the company and 57,882 No. of equity shares linked to debentures were offered for public subscription during March/April 1985.

1987 - The working results were adversely affected due to suspension of the manufacturing activities in the last quarter of the year partly due to labour problems and partly for modifications associated with the expansion of the existing hydrogen peroxide plant.

- The Company issued 1,80,000 -14% non-convertible debentures of Rs.100/- each. The debentures are redeemable at a premium of Rs.5/- per debenture after the expiry of 7 years from the date of allotment.

1988 - The turnover declined due to labour strike and shut down of Hydrogen Peroxide plant to tie in the new production facilities with the existing plant resulting in an effective working of about 9 months.

- The company privately placed 1,20,000 - 14% non-convertible debentures of Rs.100/- each with LIC, GIC and its subsidiaries. These debentures are redeemable at a prem. of Rs.5/- per debenture after the expiry of 7 years from the date of allotment.

1990 - The Research and Development division developed a technology to manufacture sodium perborate monohydrate. It also developed new formulations of plastics additives to suit the special needs of the customers.

1991 - The Research and Development division developed the technology to manufacture sodium perborate monohydrate of international quality.

- Naperol Investments Ltd. with a paid-up equity capital of Rs.24.02 lakhs and Wonderlene Investments, Ltd. with a paid-up equity capital of Rs.6,898 are wholly owned subsidiaries of the company.

1992 - Laporate Industries Ltd., U.K. had transferred their peroxygens business to Solvay S.A. of Belgium. Hence, the company will receive technical support from Solvay S.A.

- The Company revamped its sodium perborate manufacturing facility and the new plant was commissioned in April.

2002

-National Peroxide Ltd has informed that Mr Kaustubh S Koparkar has been appointed as the Secretary of the Company.

-Nusli N Wadia ceases to be a Director & Chairman of National Peroxide.

-National Peroxide Ltd has informed BSE that Mr K S Koparkar the Secretary of the Company has resigned with effect from September 30, 2002.

2006

-National Peroxide fixes Record Date

-National Peroxide has given the Bonus in the Ratio of 3:2

-Company has splits its Face value of Shares from Rs 100 to Rs 10

2008

-National Peroxide Ltd has re-appointed Mr. S R Lohokare as the Managing Director of the Company, for a further period of five years, w.e.f. May 01, 2008.

2009

-National Peroxide Ltd has entered into Gas Supply Agreement with GAIL (India) Ltd for a long term supply of Natural Gas at the Company's Kalyan Plant.

-Mr. Durgesh Mehta has been appointed as an Additional (Non-Executive) Director of the Company.

2011

-NatlPeroxide - Commencement of Commercial Production.

2012

- Board has recommended a Dividend of Rs.12/- per equity share of Rs. 10/- each (120%), to the Equity Shareholders of the Company

2013

- Board has recommended a Dividend of Rs.15/- per equity share of Rs. 10/- each (150%), to the Equity Shareholders of the Company

2014

- National Peroxide starts commercial production at Kalyan plant.

2015 -National Peroxide Ltd has shifted its Head Office to C-1, Wadia International Centre (Bombay Dyeing), Pandurang Budhkar Marg, Worli, Mumbai - 400 025.

2018 -Indian Chemical Council Award for Excellence in Management of Health & Safety 2018.

2019 -Recognition Of Outstanding Service & Support To Itc Ltd, Paperboards & Specialty Papers Division.

2020

- The Company has commenced production in kalyan (Maharashtra) plant with effect from February 2, 2020.

2024

-The Company name has changed to Naperol Investments Ltd. from National Peroxide Ltd..