The term carbonic acid gas is identified in base64 scheme by the sequence Y2FyYm9uaWMgYWNpZCBnYXM=, while the MD5 signature is equal to d3d0d2cfe54b50d03ff945b301c2b3af. The ASCII encoding of carbonic acid gas in hexadecimal notation is 636172626f6e6963206163696420676173.