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Chlorination Tablets 1.67g NaDCC – 200 per tamper evident tub

(10 customer reviews)
  • Fast Acting, Fast Dissolving , Easy to Use
  • Each tablet gives 1,000 parts per million (ppm) available chlorine per litre of water
  • EN14476 – Kills Corona Virus @ 500ppm in 5 minutes
  • Eco-Friendly Pouch Packs can be used to refill pots
£7.79 ex. Vat | £7.79 inc. Vat.


£42.50 ex. Vat | £42.50 inc. Vat.


£15.49 ex. Vat | £15.49 inc. Vat.



Prosan Chlorine Disinfectant Tablets

Prosan Chlorine Disinfectant Tablets are the safe alternative to liquid bleach (sodium Hypochlorite) and often referred to as Sodium Hypochlorite Tablets, Chlorine Tablets, Bleach Tablets or NaDCC Tablets.  Typically, 1 pot of 200 Tablets makes 1,000 Litres of HOCl Chlorine Solution at 200ppm.

  • Chlorine or Chlorination Tablets are Fast Acting, Fast Dissolving in an effervescent base.  Simply add to water to create a disinfectant solution that is ready-to-use.
  • Chlorination tablets release a stable and accurate solution of free available chlorine – perfect for due diligence
  • Drop 1 tablet into clean (potable) water to get a solution strength of 1,000 parts per million (ppm/L)
  • The 18mm diameter enables them to fit easily into a trigger spray
  • Our tablets have undergone extensive testing against:
    • EN13697 – Fungicidal Activity
    • EN13704 – Sporicidal Activity
    • EN14476 – Coronavirus
    • EN1276   – Bactericidal Activity
    • EN17126 – C.Difficile
    • EN1650  – Fungi & Yeast
  • DEFRA Approved:  This requires special label which is on our Agritabs brand
  • PN501 Prosan Chlorination Tablets contain 1.67g NaDCC which is also referred to as sodium dichloroisocyanurate and/or troclosene sodium.

NOTE:  PN501 Prosan Chlorination Tablets are equivalent to more expensive brands such as SoChlor, Actichlor, Sanichlor, Presept & Biospot.  Often, the brands disguise the product by using terminology that seems confusing – here is our guide to help:

Prosan PN501 will give the same amount of Active Chlorine as:

Actichlor 1.7g NaDCC
SoChlor 1.7g NaDCC MFB254
Presept 1.7g NaDCC – No longer Available
Sanichlor 1.7g NaDCC – Not Available
Biospot 3.25g (1.7g NaDCC)
Haz Tab H8818  1.7g NaDCC Effervescent tablets

Other brands available include: Endbac, Biochlor, Oasis, Credence 1000, Covchlor etc.  They all use the same chlorine donor and release available chlorine in water.  It’s a bit like shopping at ALDI, buy here and save £s.

Technical:  Contains Sodium dichloroisocyanurate (sometimes referred to as Troclosene sodium.)  Abbreviation:  NaDCC.
When dissolved in water, the tablets produce Hypochlorous acid (HOCl or HClO).
This is an acid that forms when chlorine dissolves in water, and itself partially dissociates, forming hypochlorite, ClO.
HClO and ClO are oxidizers, and the primary disinfection agents of chlorine solutions.

Diameter: 18mm

Formula:                              3Cl2N3O3Na
Synonyms:                          Sodium Dichloro -1,3,5 – Triazinetrione Anhydrous. Sodium Dichloro – S – Triazine -2,4,6  1H,3H,5H)-Trione. Troclosene Sodium.
CAS:                                       2893-78-9
EC/EINECS No.                    220-767-7
Chemical Name:               1,3,5 – Triazine -2,4,6 (1H,3H,5H) Trione 1,3, – Dichloro, Sodium salt
Chemical Family:              Chlorinated S Triazine Trione
Export Tariff:                     3808 9420
Manufactured in:             UK

TOP TIP:   Warm Water speeds up tablet dissolution time.  Pre-dissolve in a little warm water then pour into the usable water for the solution.

Dental: Prosan has been recommended by Dental Associations and Bodies.  Prosan Tablets are a convenient, reliable and consistent means of producing chlorine solutions for disinfection operations including: Disinfecting dental impressions and devices; Dealing with blood/ body fluid spills; Multiple hard surface disinfection such as plastic water storage bottles, work surfaces and any other chlorine resistant hard surface.

Use biocides safely. Always read the label and product information before use.

Please click on link to download Safety Data Sheet:

DS001 CASES PN501 Chlorine Tablets REV 16 – REACH UFI added 26-8-21


Click here for E C Tablets USES and instructions  

Dilution Table 3.2g ECT – 1.67g NaDCC Chlorine Tablets 1,000 parts per million (ppm)

1 Tablet in: (Clean Water) Gives Available Chlorine of Typical Uses
100ml 10,000 ppm Contaminated Body Fluid Spills & Conditions of Heavy Soiling (dirty conditions)
400ml 2,500 ppm Non-metallic Medical & Veterinary Appliances & Laboratory Discard Jars
1 Litre 1000 ppm General Disinfection in Hospital, Veterinary & Environmental Conditions
2 Litres 500 ppm Food & Catering Surface Disinfection:
Virucidal activity certified to EN 14476 (Feline coronavirus), 5 mins contact time.
Bactericidal activity certified to EN 1276 and EN 13697, 5 mins contact time.
Fungicidal/yeasticidal activity certified to EN 1650, 15 mins contact time.
2.5 Litres 400 ppm Toilets, Drains, Sinks, Sluices etc.
5 Litres 200 ppm Hard Surface Area Sanitising – (after cleaning off visible dirt & debris) 3 mins contact time.
7–40 Litres 150–25 ppm Produce Washing – Strengths & Contact times vary – see specific guidelines
8 Litres 125 ppm Baby Feeding Equipment Sterilisation – min. 30 mins contact time.
10 Litres 100 ppm Showerheads – descale & rinse well before using Chlorine and ensure no trapped bubbles when immersed.
Cloths & Mops – 30 mins contact time or double strength 15 mins contact time. Do not leave overnight.
250–500 Litres 4–2 ppm Water Butts

Note:  Always mix up a fresh solution every 24 hours, each shift or when visibly contaminated.

FOGGING:  If you are using tablets to create a HOCl solution, 1 tablet gives 1,000 parts per million (ppm) available chlorine (HoCl) per litre of water.  (See Description tab for technical information.)

Click on the links below for other useful information:

Ice Cream Machine Sanitsing:  IceCreamMachines

Legionella Control:  Control of Legionella using Chlorine Tablets

Hot Tubs and Spas:  Chlorine – PN501 Chlorine Instructions for use with Hot Tubs and Spas

Chlorine use in the Food Industry:  PN501 Chlorine Use in the Food Industry

Water Supply:  Water Supply Hygiene Guidelines

Domestic Plumbing & Water Tanks: Domestic Plumbing and Water Tank Chlorination Guidelines

TOP TIP:   Warm Water speeds up tablet dissolution time.  Pre-dissolve in a little warm water then pour into the usable water for the solution.

10 reviews for Chlorination Tablets 1.67g NaDCC – 200 per tamper evident tub

  1. Gavin Cardno (verified owner)

    Excellent product we use this for cleaning dry suits after training sessions on our pool.

  2. A.Jones

    Does the job..reasonable price…despatched promptly.

  3. P Sitch

    Dear Helen

    Just a short note to inform you of the efficacy of your purifying tablets I shocked the system at a high dose for three times longer than recommended last year, 24 hours. I use 4 tablets for 265 litres for the ongoing fill, slightly more than recommended and use a chlorine filter on the drinking water, and have had NO problems since. A friend refuses to use your product preferring to use cleaning bleach. He has to flush his every 3 months. I did ensure that the water ran through every part of the system including anchor wash and deck shower.

  4. C Meeks

    Very fast delivery. Chlorine tablets will be of great use in our clinic in The Gambia.

  5. J MacDonald

    received chlorine tablets next day even though ordered on a 2-4 day delivery service placing order at 3pm. will be using again

  6. H Gaze

    We were provided with advice on the type of tablet to use for our humidifiers and the shipping was very good. Lovely customer service as well.

  7. S Berkon

    I am so pleased with my purchase (Effervescent Chlorine Tablets) and very surprised as to the speed in which it was delivered. Super service. I shall definitely be ordering from you in future and recommending you to friends and family members 🙂

  8. Mrs A D McVean

    So pleased to have found a reliable source

  9. S Hamilton

    Excellent product as it says and prompt delivery of the product would recommend them to anyone who wants to do business with them.

  10. Madge

    Did the job, I purchased for the rain water harvester, and it got rid of the smell

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Please click on link to download Product Fact Sheet:

PN501 H4L Prosan 1.67g ECT Product Fact Sheet – Rev 4

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This business expansion has been supported by New Anglia Local Enterprise Partnership, through the Business Resilience and Recovery Grant Scheme.


Reg. in England No. 04994444
VAT No. GB 811 8376 32
Dunn & Bradstreet 73-736-5309
EORI GB 811 8376 32000
NI: XI811837632000

Quality Assurance

Maclin Sourcing Solutions Ltd (trading as Maclin Group & Hygiene4less) are a BS EN ISO 9001:2015 accredited company and audited by one of the world's leading Inspection, Verification, Testing and Certification companies, CQS. Certificate number GB2004521.

Cert No: 003-2023

Maclin Group also operate Good Manufacturing Practise (GMP), specifically in the production of Chlorine Release Tablets.

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