Observed H³⁵Cl and H³⁷Cl J = 1– 0 line spectra towards the remaining sources displaying only emission features, along with a fit (solid red curve), in the upper panels. The hyperfine structure splitting deconvolved column density profiles are illustrated in the lower panel, where dN/dυ and the 1σ errors for the fitted emission components are displayed by the blue solid curve and blue shaded region. The H³⁵Cl and H³⁷Cl spectra, possessing a strong outflow, are contaminated by SO⁺ and by CH₃CN and CH₃OCH₃, respectively, towards the red wing. The fits to the SO⁺ line are shown by the dashed cyan curve. The fit of the contaminating line is overlaid as a dashed cyan curve. The fit to the H³⁵Cl spectrum after subtracting contributions from SO⁺ is displayed by the dashed red curve. The solid red line represents the combined XCLASS fit to both, H³⁵Cl and SO⁺. No fit has been performed, if the line temperature of a transition is lower than 3σ for the given RMS, or if no baseline could be estimated (NGC 6334I).