Jquery Syntax error, unrecognized expression:

Why do I get this error and how can I test for it so it wont break, I tried checking for null but obviously that wont work, thanks.

Please don't advice to not write the ID like this as I know its wrong but it is a possibility.

var jsonTest = [
  {
    "myId": "''''''\"\"\"\"'''''''''''''\"#####$'''''",
  }
];

alert(jsonTest[0].myId); 
// Works - alerts the myId

$('#' + jsonTest[0].myId ).length; 
// Error: Syntax error, unrecognized expression:
// #''''''""""'''''''''''''"#####$'''''