The specific rotation \([\alpha]\) is given by:
\[
[\alpha] = \frac{\alpha_{\text{obs}}}{c \cdot l}
\]
where:
- \(\alpha_{\text{obs}}\) is the observed rotation,
- \(c\) is the concentration of the solution in g/mL,
- \(l\) is the path length in decimeters (dm).
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