The term orthophosphorous acid is identified in base64 scheme by the sequence b3J0aG9waG9zcGhvcm91cyBhY2lk, while the MD5 signature is equal to 72d2d35357254b92708c87585cf572dc. The ASCII encoding of orthophosphorous acid in hexadecimal notation is 6f7274686f70686f7370686f726f75732061636964.