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pH Adjustment Additives

Correct pH balance is a key factor in many processes. pH plays a very significant role in everyday life from affecting blood composition in the human body, to regulating plant growth, and governing the application of paint. Many water treatment processes are pH dependent. Processes like effectiveness of chlorination, formation of chloramines, floc formation in coagulation processes, corrosion of metal equipment and piping are heavily depend on water pH. Moreover, pH of water determines efficiency of iron and manganese removal.

We recommend to use pH correction as a first step in a water treatment sequence, because it will influence further chemical reactions. We can help to verify pH levels in raw and treated water. Our water quality assessment services can determine the type and quantity of pH correction additives required.

Above all,  pH correction products are available through Osorno Store in 1 litre bottles, 20 litre delcans or 208 litre drums.

Sodium Hydroxide

pH increasing agents are mainly used in water treatment plants. Sodium hydroxide is the most valuable correction additive for raising pH. In addition, another pH correction chemical often used at water plants is sodium carbonate (soda ash). However, soda ash is recommended for use in applications when water alkalinity increase is required.

Therefore, some examples of sodium hydroxide use include:

  1. Manganese can be removed only after addition of an oxidant and at a pH of 7.8 – 7.9.
  2. Iron removal requires addition of an oxidant and a pH of 7.4 – 7.9.
  3. Formation of floc in flocculation/coagulation is pH dependant, but each flocculant has its own flocculation pH.
  4. Corrosion processes speed up if the pH in water reservoirs and distribution lines is lower than 7.8.

We suggest to use sodium hydroxide over using soda ash when main focus is pH increase. Sodium hydroxide has twice the capacity to increase pH then soda ash. Another words, for a given pH correction, the sodium content will increase only by half, which is a very important consideration for people concerned with high sodium content in food and water. There are only a particular applications where soda ash is required.

Both Sodium Hydroxide 20% (Caustic Soda, ANSI60 certified), Sodium Hydroxide Beads and Sodium Hydrogen Carbonate (Soda Ash) can be purchased at Osorno Store.

Download brochure, Sodium Hydroxide 20% label


Hydrochloric Acid

Hydrochloric acid is recommended for decrease of pH in swimming pools and water treatment plants.

Swimming pools:

  • The pH level in swimming pools has to be consistently within a  range of 7.4 – 7.6 to avoid eye irritation and itchy, sticky skin.
  • High pH can cause a hazy, murky, or cloudy pool.
  • Chlorination is more effective when pH is below 7.4.
  • Over time, high pH can cause water to scale, resulting in clogged filters and fittings.

Water treatment plants:

  • Manganese removal requires addition of an oxidant, and a pH of 7.8 – 7.9.
  • Iron removal occurs at pH of 7.4 – 7.9.
  • Coagulation processes depend on use of a coagulation agent, and a pH usually below 6.

Hydrochloric Acid 9% (ANSI60 certified) can be purchased at Osorno Store.

Download brochureDownload HCl label

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Osorno Enterprises Inc.
976 Elgin Avenue
Winnipeg MB R3E 1B4
+1 204 488-1538 (Phone)
+1 204 488-1566 (Fax)
Regular Hours of Operation
We are closed on December 24 - 28, 2020 and
December 31, 2020 - January 4, 2021
Monday - Friday: 9:00 - 17:00
Saturday - Sunday: Closed
We are closed on Remembrance Day

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