Orthoxylene is used as part of the manufacturing process to make
phthalic anhydride (which is used to make
PVC and other plastics),
anti-bacterial compounds, and
herbicides.
structural formula of ortho-xylene:
H H
\ /
C == C H
/ \ /
H -- C C -- C -- H
\\ // \
C -- C H
/ \
H C -- H ortho-xylene
/ \ C8H10
H H