Is Ethanesulfonic acid - methyl (3Z)-3-{[(4-{methyl[(4-methyl-1-piperazinyl)acetyl]amino}phenyl)amino](phenyl)methylene}-2-oxo-6-indolinecarboxylate (1:1) (CAS: 656247-18-6) safe?

Ethanesulfonic acid - methyl (3Z)-3-{[(4-{methyl[(4-methyl-1-piperazinyl)acetyl]amino}phenyl)amino](phenyl)methylene}-2-oxo-6-indolinecarboxylate (1:1) (CAS: 656247-18-6) is generally considered safe when handled properly in controlled environments. However, as a chemical compound, it should be treated with caution, especially during synthesis and purification. Safety measures include wearing personal protective equipment (PPE) and ensuring proper ventilation. It is important to follow standard laboratory safety protocols and consult safety data sheets (SDS) for detailed information on handling and exposure limits.