The woman, a resident of Ranaghat in Nadia district, was waiting at the Chittaranjan railway station late last night when the attacker came up to her, threw acid at her face and fled, police said.
She suffered burn injuries on her face and other body parts and was rushed to the Chittaranjan Railway hospital by police.
The woman in her complaint to police alleged that Ripon Das, a resident of Ranaghat, who used to stalk her, carried out the attack.