  In this work, we calculate the magnetic moment and axial charge of the octet
hidden-charm molecular pentaquark family in quark model. The Coleman-Glashow
sum-rule for the magnetic moments of pentaquark family is always fulfilled
independently of SU(3) symmetry breaking. In the $ 8_{2f} $ flavor
representation, the magnetic moments of hidden-charm molecular pentaquark
states with spin configuration
$J^{P}=\frac{1}{2}^{-}(\frac{1}{2}^{+}\otimes0^{-})$ are all equal to
$\mu_{c}=0.38\mu_{N}$. The axial charges of octet hidden-charm molecular
pentaquark states are quite small compared to the axial charge of nucleon. The
axial charges of the pentaquark states with the spin configuration
$J^{P}=\frac{1}{2}^{-}(\frac{1}{2}^{+}\otimes0^{-})$ in $8_{2f}$ flavor
representation are all zero.
