Spectra of L1544, L134N, TMC-2, Lupus-1A, and L1489 in the region covering two of the brightest hyperfine components of the 1_0,1–0_0,0 transition of H₂CN, lying at 73 345.486 MHz and 73 349.648 MHz. In red we superimpose the computed synthetic spectra for H₂CN, adopting the column densities given in Table 3, an ortho-to-para ratio of 3, a rotational temperature of 4.0 K, a line width consistent with the values derived from the observations (see Table 2), and an emission size that fills the IRAM 30 m main beam.