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hydrochloric acid 4% purest

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Laboratory-tested raw materials
H HCl 4%
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Hydrochloric acid 4% ultrapure 100ml 250m in brown glass bottle with dropper insert
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CHF 14.00
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CHF 13.58
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CHF 12.60
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1 bottle
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Hydrochloric acid 4% purest

Produced and bottled in Switzerland by mychem.ch

Content: 100 ml / 250 ml
Formule: HCl
Purity: puriss.

Item number 1026 / 1027


100 ml: brown glass bottle with child safety lock, tamper-evident and drop counter.
250 ml: HDPE canister with tamper-evident closure, child safety lock, tactile warning symbol, lateral graduation.

Instructions for the preparation of chlorine dioxide solution


Make sure the room is well ventilated, as chlorine dioxide gas escapes during the chemical reaction and you must not inhale it.
Be careful to mix only small amounts, e.g. three drops each. Larger quantities produce large amounts of gas.


Mix sodium chlorite (NaClO2) and hydrochloric acid (HCl) in a ratio of 1:1 in a container.
The dropper insert of our 100ml bottle is suitable for this purpose. Alternatively, you can use a pipette (rinse well after using each chemical).

After only about 45 seconds, you can already use the resulting CDS.

Ready-made Mychem CDS in comparison to home-made CDS

One drop of each NaClO2 and HCI corresponds to the effective amount of eight drops of our ready-made CDS.
Example: 3 drops of NaClO2 mixed with 3 drops of HCl = 24 drops of Mychem CDS.


The CDS obtained by mixing NaClO2 and HCl contains by-products from the raw chemicals and does not reach the purity of our finished CDS.
The manufacturing process of our CDS is a special, elaborate Mychem proprietary development based on the reaction process. For the manufacturing process, we use only high-purity, very expensive raw materials that are not commercially available. The result is our CDS in its purest form.

Personal security

Delivery only to adults over 18 years. 


  • Shipping only in Switzerland & Lichtenstein. No shipping abroad possible!
  • Signature: The packages are handed over to the recipient only against signature.

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extra information

MYCHEM quality: MYCHEM offers the highest possible product quality and purity. It stands up to the absolute highest quality comparisons and requirements.
- Home improvement / hobby from 18 years
(Before buying please note hazard warnings)
Etiquette: Danger, safety and disposal instructions
We take back small amounts of private individuals free of charge
 Gefahr H290: Kann gegenüber Metallen korrosiv sein. Peut être corrosif pour les métaux. May be corrosive to metals.
H314: Verursacht schwere Verätzungen der Haut und schwere Augenschäden. Provoque des brûlures de la peau et des lésions oculaires graves. Causes serious irritation of the skin and serious eye damage.
H335: Kann die Atemwege reizen. Peut irriter les voies respiratoires. May irritate the respiratory system.

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5.00 2
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The following ratings have been submitted for this article:
Beste Kombination
- : (0 out of 0 Customers found this review helpful)
Sehr empfehlenswert! Gutes hochwirksames Produkt in Verbindung mit Natriumchlorit, hilft bei diversen Problemen. Toller Service, gerne wieder.
Beste Kombination
- : (0 out of 0 Customers found this review helpful)
Super Produkt in Kombination mit Natriumchlorit! Nutze es zur Produktion von CDL und bin sehr zufrieden.
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