Hartley, 25, was cited following an alleged incident in the first half of England's 30-9 RBS 6 Nations victory over Ireland at Twickenham last Saturday.
The Northampton hooker remains suspended until he appears before the independent Six Nations disciplinary committee, which will be chaired by Roger Morris in London next week.
A biting offence carries a low-end entry point of a 12-week suspension, with 18 weeks for mid-range and 24-plus weeks at the top end in the International Rugby Board's disciplinary sanctions table.
If Hartley is banned, he could be ruled out of England's three-Test tour to South Africa in June.
Match referee Nigel Owens did not see the alleged incident, but the Welsh official told the two captains - England's Chris Robshaw and Ireland's Rory Best - that he had received "an accusation of biting" and had seen "a clear mark on the finger".
Robshaw insisted after the game that he had not seen anything untoward on the pitch.
Asked how he would react if one of England's players had bitten an opponent, Robshaw said: "It is one of those things we will have to address when we meet up, but at the moment it is innocent until proven guilty, so to speak.
"We will see what happens."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
$29.99
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.
