(1)	$\begin{array}{l}\displaystyle \rho_w(T, p) = \rho_w^*(T, p) / B_w(T, p)\end{array}$

(2)	$\begin{array}{l}\displaystyle \rho_w^*}(T, p) = 62.368 + 0.438603 \cdot S + 0.00160074 \cdot S^2\end{array}$

where

$\begin{array}{l}\rho_w(T, p)\end{array}$	Water density with salinity $\begin{array}{l}S\end{array}$ at temperature $\begin{array}{l}T\end{array}$ and pressure $\begin{array}{l}p\end{array}$
$\begin{array}{l}\rho_w^*(T, p)\end{array}$	Pure water density (with zero salinity $\begin{array}{l}S = 0\end{array}$ ) at temperature $\begin{array}{l}T\end{array}$ and pressure $\begin{array}{l}p\end{array}$
$\begin{array}{l}T\end{array}$	Temperature, °F
$\begin{array}{l}p\end{array}$	Pressure, psi
$\begin{array}{l}S\end{array}$	Water salinity, wt%

Reference

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