Is HD80 this stuff?

[Tim UK 14]

Hi, here in the uk I have been trying to find 'HD80', which I believe to be hydrochloric acid.

I am attaching a picture of the label of a container of something that says that it's hydrochloric acid 80, and the strength of it is said on the contianer to be 17%.

I know someone in the uk who says that the hydrochloric acid they use is 100% - is this wise, even if diluted at 10:1? The stuff I have bought says to dilute 10:1.

I am anticipating using this stuff to deal with limescale issues on brick and concrete slabs.

Thanks all,

Tim