Thanks for the reminder, good chemical - needs special handling !
In South East Asia marketed under brand name "VIXOL"
Hydrochloric acid --------------20% (W/W)
Ethoxylated Nonylphenol --- 0.70% (W/W)
Requires a Dangerous goods label
Dangerous goods label for hydrochloric acid also known under its old name : Muriatic acid
: a corrosive Dangerous goods label for hydrochloric acid required : corrosive
Hydrochloric acid in high concentrations forms acidic mists. Both the mist and the solution have a corrosive effect on human tissue, potentially damaging respiratory organs, eyes, skin and intestines. Upon mixing hydrochloric acid with common oxidizing chemicals, such as bleach (NaClO) or permanganate (KMnO4), the toxic gas chlorine is produced. To minimize the risks while working with hydrochloric acid, appropriate precautions should be taken, including wearing rubber or PVC gloves, protective eye goggles, and chemical resistant clothing. Do not breathe fumes !!!!
The hazards of solutions of hydrochloric acid depend on the concentration. The following table lists the EU classification of hydrochloric acid solutions:
by weight Classification R-Phrases
10%–25% Irritant (Xi) R36/37/38
>25% Corrosive © R34 R37
The Environmental Protection Agency rates and regulates hydrochloric acid as a toxin.
If using on a hull - once you have completed wash with solutions of hydrochloric acid ,
rinse hull several times with fresh water, then rinse with a mild alkali solution - eg..bicarbonate of soda.
Here is an example of cleaning rust off engine mounts that were rusted by seawater - using
20% hydrochloric acid.
The one on the right is the cleaned up mount shown above :