72 Hours Flash Sale
Save up to 59% on select HP tech, FREE shipping storewide.
24 months special financing on purchases of $1,500 or more with the HP Credit Account.+
Shop
HOME/
INK, TONER & PAPER/
TONER CARTRIDGES/
HP 645 TONER CARTRIDGES/
HP 645A Cyan Original LaserJet Toner Cartridge, C9731A

HP 645A Cyan Original LaserJet Toner Cartridge, C9731A

Other offers available with the product:

FREE Priority Shipping on Ink and Toner

Earn 3% back in HP Rewards on select printers, ink, toner, and paper

72 Hour Flash Sale

Product # C9731A
  • Original HP cartridge, designed for reliability and consistency
  • Standard size, when you need just one
  • ~12,000 pagesSee all Specs

Can't find what you are looking for?

Selected options

(16 more available)
HP 645A Cyan Original LaserJet Toner Cartridge, C9731A
3% back in HP Rewards
Get the best results from your HP printing system. HP Smart technology[1] and chemically-grown toner formulas in HP 645A LaserJet Toner Cartridges work with your printer to deliver accurate, consistent color and reliable, cost-effective performance.

Take pride in high-quality prints with Original HP Toner.

The choice you can trust to help avoid reprints and wasted supplies. Choose Original HP Supplies, designed for reliability and consistency.

Outstanding color

Consistently accurate color and precise images with HP chemically-grown toner Optimal print quality with new image mode feature[3]

Reliable, cost-effective

Cost-effective operation with all-in-one HP toner cartridges HP Smart technology[1] tunes particle charge for reliable results Rated A+ for service and reliability, PC Magazine August 2003

Easy to use

Easy to use automatic alerts, on-line ordering with HP Smart printing technology[1] When a color cartridge runs out, continue printing with the black cartridge[2] Easy to use and install with HP Smart printing technology[1]

Technical details

Color(s) of print cartridges

Cyan

Print technology

Laser

Page yield (colour)

~12,000 pages

Page yield footnote

Approximate yield based on 5% average coverage. Actual yields vary considerably based on content of printed pages and other factors.

Operating temperature range

59 to 77°F

Storage temperature range

-4 to 104°F

Operating humidity range

20 to 80% RH

Storage humidity

10 to 90% RH

Recycled content in cartridge

17%

Package dimensions (W x D x H)

19.69 x 6.3 x 10.43 in

Package weight

6.38 lb

Warranty

HP's Premium Protection Warranty. This HP product is warranted to be free from defects in materials and workmanship.

What's in the box

Toner cartridge; Recycling guide
HP 645A Cyan Original LaserJet Toner Cartridge, C9731A is rated 5.0 out of 5 by 2.
  • y_2025, m_3, d_30, h_10
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_C9731A, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_hp
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getAggregateRating, 8ms
  • REVIEWS, PRODUCT
Rated 5 out of 5 by Steeleye from always great I have been using this product with my laserjet 550 for many years and it never disappoints.
Date published: 2013-07-09
Rated 5 out of 5 by Somamac from Defective Cartridge / High Cost This cartridge was ordered to test whether my 5550n or the cyan cartridge in it (ordered in May 2011) was defective causing a memory tag message to come up on the printer display. The new cartridge worked, indicating it was the older cyan cartridge, and not the printer, that had a problem. (I had never had this problem with any 5550n cartridge ordered previously.) The new cyan cartridge has worked flawlessly so far. The HP cartridges for this printer are very good ... and, in my view, unreasonably expensive. Even with the discount offered for multiple purchases over the course of a year ("My Print Rewards"), I am continually forced to rethink whether it makes economic sense to use cartridges from HP for this printer. Replacing all 4 cartridges cost well over $1100. Astonishing!
Date published: 2011-11-19
  • y_2025, m_3, d_30, h_10
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_C9731A, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_hp
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 3ms
  • REVIEWS, PRODUCT
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 19ms
  • QUESTIONS, PRODUCT
  • bvseo-msg: The resource to the URL or file is currently unavailable.;

SIMILAR PRODUCTS

Return and exchange information
HP.com will accept returns or exchanges for this product up to 30 days from the date of delivery. A 15% restocking fee may apply. For details, please visit: https://www.hp.com/us-en/shop/cv/returnsandexchanges.