It's an old pulp sci-fi novel of my dad's that I read in the 80s that I think came from the late 60s to early 70s.
The basic plot was that a hazardous mission to explore a distant planet was crewed with "freaks", people who had suffered accidents or had genetic abnormalities, and as a result were tougher and stronger than regular folk. The leader was a guy with no arms, whose face could light up after exposure to a dangerous chemical. Another guy had no legs, but massively strong arms. There was a fat woman who wore an acid filled suit to retard the constant growth of her flesh.
That's all I can remember about it as I read it 30 or so years ago, but it made a strong impression on me.