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Commodity Substance: Sodium Hypochlorite

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Food and Environment Protection Act 1985
Control of Pesticides Regulations 1986

Date of issue: 9 February 2019

Date of expiry: 31 August 2019 (unless earlier decisions are made or further prescribed extensions)

Notice is hereby given that in exercise of the powers conferred by Regulation 5 of the Control of Pesticides Regulations 1986 (SI 1986/1510) (as amended) and of all other powers enabling them in that behalf, the Health and Safety Executive ("HSE") for and on behalf of the Secretary of State, the Welsh Ministers and the Scottish Ministers and the Department of Agriculture, Environment and Rural Affairs in Northern Ireland, have given full approval for the use of the following Commodity substance:

Sodium Hypochlorite being

This Approval is Subject to the Following Conditions

Field of use

Only as a bactericide or viricidal seed treatment.


Mushroom (bactericide only).

Tomato seeds (viricide only).

Maximum Individual Dose

See other specific restrictions.

Latest Time of Application

One day before harvest.

Operator Protection

  1. Engineering control of operator exposure must be used where reasonably practicable in addition to the following personal protective equipment: Operators must wear suitable protective clothing (coveralls), suitable protective gloves and face protection (faceshield) when handling the concentrate.
  2. However, engineering controls may replace personal protective equipment if a Control of Substances Hazardous to Health (COSHH) assessment shows they provide an equal or higher standard of protection.

Environmental Protection

Since this substance is harmful to fish or other aquatic life surface waters or ditches must not be contaminated with chemical or used container.

Other Specific Restrictions

  1. This substance must only be used by operators who are suitably trained and competent to carry out this work.
  2. For the treatment of mushrooms the maximum concentration must not exceed 315 mg sodium hypochlorite per litre of water (equivalent to 150 mg available chlorine per litre of water).
  3. For the treatment of tomato seeds the maximum concentration must not exceed 38.85g sodium hypochlorite per litre of water (equivalent to 18.5g available chlorine per litre of water) ie a concentration of 1.85% available chlorine.

Advisory Note

Mixing and loading must only take place in a ventilated area.

Further information

Updated 2020-08-11