F 91 Filter VH
Acid detergent for membranes

Strongly acidic detergent for membranes. Efficiently removes and dissolves deposits on membrane surface.

Special features

  • Efficiently removes and dissolves deposits on membrane surface.




For CIP cleaning of filtering membranes tolerating strong acidity (UF, MF, NF, RO) in the food and process industries.
Suitable for low temperature washes (operating temperature 20-85 °C).


Product pH: 1
Solution pH: 2

Appearance and scent

Clear, colourless liquid

Country of manufacture


Package Size Product Code GTIN
1 x 200 l 60098 6417964600988

Store tightly sealed in the original packaging in a dry and cool environment (over 5 °C temperature) . Keep separated from substances reacting with acids. Must not freeze.

Instructions for use

The restrictions stated by the equipment and membrane manufacturers must be followed when using the detergent (pH, temperature, etc.). The washing programme is set on a case-by-case basis depending on the washing target and in accordance with the instructions issued by the equipment manufacturer.

0.1-1.0 %, circulated washing time 15 - 45 min, operating temperature: 45 - 60ºC.
Other locations: 0.5-3.0% according to separate instructions, operating temperature 20 - 85 ºC.

Environment and safety

Surfactants in the product are biodegradable. Clean, empty packaging materials can be recycled environmental safety or used in energy production.


Not suitable for light alloy surfaces.

Ingredient Effect
Nitric acid (24-26 %) Removes and dissolves deposits
Phosphoric acid (15-30 %) Removes and dissolves deposits