Hydrate and anhydrous crystal form of the sodium salt of 2-iodo-N-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoyl]benzenesulfonamide, process for preparation thereof and use thereof as herbicides and plant growth regulators

A sodium salt of 2-iodo-N-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoyl]benzenesulfonamide, wherein the salt is present as crystal form I or hydrate (crystal form II), the respective x-ray powder diffractograms of which at 25° C. have at least three of the following 20 (2 theta) values:

• 2 θ
• D [Å ± 0.2]
• crystal form I
• 6.0
• 14.7
• 8.9
• 9.9
• 9.9
• 9.0
• 11.1
• 8.0
• 12.8
• 6.9
• 16.7
• 5.3
• 24.0
• 3.7
• 24.3
• 3.7
• 26.6
• 3.4
• 26.9
• 3.3
• hydrate (crystal form II)
• 6.8
• 13.0
• 7.2
• 12.3
• 9.8
• 9.0
• 11.8
• 7.5
• 13.6
• 6.5
• 14.4
• 6.2
• 16.6
• 5.3
• 22.1
• 4.0
• 25.1
• 3.5
• 26.4
• 3.4