Table A1: Fitting coefficients of CO-para-H₂ rates, following formula 3. I and F are the initial and final rotation states, respectively. The rates thus obtained are in cm³ s^-1.

I	F	a0	a1	a2	a3	a4
1	0	-10.413	4.162	-20.599	32.563	-16.889
2	0	-9.202	-7.997	18.452	-18.717	6.910
2	1	-0.379	-59.429	131.662	-127.161	45.605
3	0	-3.319	-35.329	53.745	-29.641	2.471
3	1	-7.042	-20.755	48.788	-49.875	18.607
3	2	-1.976	-48.986	107.139	-102.134	36.288
4	0	-8.004	-16.164	28.359	-21.986	6.026
4	1	1.979	-69.801	140.821	-125.047	40.556
4	2	-5.102	-34.014	82.717	-87.211	33.665
4	3	-1.891	-49.861	109.419	-103.434	35.726
5	0	7.564	-106.151	220.187	-205.770	72.462
5	1	-5.209	-32.541	67.718	-63.996	23.105
5	2	4.736	-91.653	203.779	-201.295	73.681
5	3	-5.607	-31.380	78.077	-83.702	32.930
5	4	-0.510	-60.401	137.793	-134.344	46.449