Patent ID: 8048189

Claim:
A solution for use in reducing the volatility of urea fertilizers comprising N-(n-butyl)-thiophosphoric triamide (NBPT) dissolved in a buffered reaction mixture of an amino alcohol having the formula 1—(H) x —N—((CH 2 ) m —OH) n where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0 or the formula 2—(H) y —N—((CH 2 )—CHOH—CH 3 ) z such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0, and a carboxylic acid having 6 or fewer carbon atoms to form an NBPT solution, said buffered reaction mixture containing the ammonium ion of said amino alcohol, the carboxylate ion of said carboxylic acid, and said amino alcohol, and having a pH of 8 to 10.