For stain weakly acidic sulfated mucosubstances, hyaluronic acid and
sialomucins.
References: AFIP Manual of Histological Stains Methods, 3rd Ed, Ed. L. Luna: New York McGraw Hill Publications, c. 1968, p. 163.
Lev, R. & Spicer. S.S., J. Histochem Cystochem, 12:309, 1964