β-Alanine, N-[5-[[4-chloro-6-[[8-hydroxy-3,6-disulfo-7-[2-(1-sulfo-2-naphthalenyl)diazenyl]-1-naphthalenyl]amino]-1,3,5-triazin-2-yl]amino]-2-sulfo-4-[2-[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]phenyl]-, sodium salt (1:?)