Energy levels, transition frequencies and Einstein A coefficients were taken from the JPL catalog. The collisional rates are taken from Danby et al. (1988) and were calculated for temperatures in the range from 15 to 300 K including energy levels up to about 420 cm^-1 for collisions with para-H₂. At present no extrapolated rate coefficients are made available.

More recent calculations by Bouhafs et al (2017) use a more accurate interaction potential, but cover a smaller temperature range.

For NH₂D, we provide collision data by Daniel et al (2014), which cover energy levels up to 512 cm^-1 for collisions with ortho- and para-H₂ at temperatures from 5 to 300 K. The spectroscopy for this species is taken from the CDMS catalog.