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HP 645A, Cyan Original Toner Cartridge (C9731A)
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HP 645A, Cyan Original Toner Cartridge (C9731A)

Item # 531100 OfficeMax # 20231198
  • Yields up to 12,000 pages.
  • Greener choice — contains 20% total recycled content.
Your Price $432.99 $432.99
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  • Quantity
  • Material Safety Data Sheet

In Stock

Free delivery

Estimated delivery 3-5 business days

Pricing, Assortment and Availability
HP Preferred Supplies Partner

  • Compatible HP models:
    • Color LaserJet: 5500, 5500dn, 5500dtn, 5500hdn, 5500n, 5550, 5550dn, 5550dtn, 5550hdn, 5550n
  • Compatible Canon models:
    • imageCLASS C3500, LBP-2710, LBP-2810, LBP5700, LBP5800
  • Yields up to 12,000 pages. 
  • Greener choice — contains 20% total recycled content. 
  • Print professional-quality marketing materials with impressive color. 
  • The information contained herein is subject to change without notice.  The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

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Item # 531100 
Manufacturer # C9731A  
brand name HP
manufacturer Hewlett-Packard
model name 645A (C9731A)
color Cyan
quantity 1
maximum yield per unit 12,000 pages
print technology laser printer/copier/fax
remanufactured no
compatible machine models HP models: Color LaserJet: 5500, 5500dn, 5500dtn, 5500hdn, 5500n, 5550, 5550dn, 5550dtn, 5550hdn, 5550n; Canon models: imageCLASS C3500, LBP-2710, LBP-2810, LBP5700, LBP5800
postconsumer recycled content 0%
total recycled content 20%

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Rated 5 out of 5�by 3 reviewers.
Rated 5 out of 5�by 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! November 18, 2011
Rated 5 out of 5�by HP We use this product because it has the best quailty July 7, 2011
Rated 5 out of 5�by High yield easy to replace Good Product. high yield lasts awhile easy to replace in Machine September 23, 2008
  • 2015-04-24T09:19:53.042-05:00
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Key Specifications

  • Cyan

    cartridge color

  • 12,000

    page yield

  • 1

    number of cartridges

Product Overview

  • Consistently accurate color and precise images with HP chemically-grown toner
  • Cost-effective operation with all-in-one HP toner cartridges
  • Easy to use automatic alerts, on-line ordering with HP Smart printing technology1

This product offers

  • C9731A - Toner yield
  • Toner yield

    Page yield (colour): ~12,000 pages *

  • C9731A - HP Planet Partners
  • HP Planet Partners

    Get free cartridge recycling through HP Planet Partners. For more information, visit


Compatible printers

  • HP Color LaserJet 5500n Printer
  • HP Color LaserJet 5500 Printer
  • HP Color LaserJet 5500dn Printer
  • HP Color LaserJet 5500dtn Printer
  • HP Color LaserJet 5500hdn Printer
  • HP Color LaserJet 5550n Printer
  • HP Color LaserJet 5550dn Printer
  • HP Color LaserJet 5550dtn Printer


  • 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

  • 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

More Information

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