Hewlett Packard
Compatible HP 5550dn (C9731A) Toner Cartridge Cyan
- Page Yield:
- 12,000 Pages
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Page Yield:
- 12,000 Pages
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Compatible Printers
- Color LaserJet 5500
- Color LaserJet 5500dn
- Color LaserJet 5500dtn
- Color LaserJet 5500hdn
- Color LaserJet 5500n
- Color LaserJet 5550
- Color LaserJet 5550dn
- Color LaserJet 5550dtn
- Color LaserJet 5550hdn
- Color LaserJet 5550n
- LaserJet 5500
- LaserJet 5500dn
- LaserJet 5500dtn
- LaserJet 5500hdn
- LaserJet 5500n
- LaserJet 5550
- LaserJet 5550dn
- LaserJet 5550dtn
- LaserJet 5550hdn
- LaserJet 5550ni>
- i>
- HP 645A
- Specifications
- SKU:
- CLS-HP-5550dn-C
- Printer Brand:
- Hewlett Packard
- OEM Number:
- C9731A
- Ink Color:
- Cyan
- Page Yield:
- 12,000 Pages
- Printer Type:
- Laser Cartridge
- Condition:
- New Compatible
- Description
- Reviews


Explore the robust and reliable printing capabilities of the HP 645A Color LaserJet Series, offering a comprehensive range of printers to meet diverse printing requirements. The Color LaserJet 5500DN, 5500DTN, 5500HDN, and 5500N models provide high-quality color printing, while the 5550DN, 5550DTN, 5550HDN, and 5550N offer enhanced performance and versatility. Experience vibrant color printing with the C9730A Black, C9731A Cyan, C9733A Magenta, and C9732A Yellow toner cartridges, compatible with the HP 645A toner cartridge and toner cartridge options. These cartridges ensure consistent and reliable print quality for a variety of printing tasks, from documents to marketing materials. Invest in a printing solution that meets your business needs with the HP 645A Color LaserJet Series, known for its exceptional performance and professional-grade results. Whether it's the Color LaserJet 5500 series or 5550 series models, these printers deliver superior print quality and reliability for all your printing needs.
Frequently Asked Questions
Which cyan cartridge fits the 5550dn?
C9731A, the cyan of the 645A family. The dn suffix marks the printer as a duplexing network model; the supply is the same cartridge, confirmed by the C9731A stamp on the one you remove.
Our quarterly reports are full of charts. What does cyan do there?
It draws them. The lead data series in most chart palettes is blue, and comparison bars, trend lines and map shading all lean on cyan. A fading cartridge does not just dull the report — it can make two data series hard to tell apart.
How does duplex printing affect the cartridge's life?
The 12,000-page rating counts printed sides. A 60-page report printed two-sided is 60 pages of cyan spending on 30 sheets, so a dn in a reporting cycle works through its rating on roughly half the paper a newcomer expects.
How do we keep color consistent across a long report run?
Start the run on a cartridge with healthy level, and do not swap mid-run unless you must: a fresh cartridge prints slightly richer than a tired one, and a board pack with visibly different chart blues between page 10 and page 200 invites questions.
The whole department prints to this machine. Who should watch the toner?
One named person, checking the supplies page on the printer's web interface weekly — and daily during reporting season. Shared machines fail socially before they fail mechanically: everyone saw the warning, nobody owned it.
What if we need help or a return?
The cartridge is covered by a 1-year warranty with 1-year free returns, support answers Monday through Friday, 9 AM to 5 PM CST, and orders ship from our warehouses in Illinois, Pennsylvania, Georgia and California. The shipping and returns page has the details.
About This Cyan Cartridge for the Color LaserJet 5550dn
For the HP Color LaserJet 5550dn, this C9731A cyan cartridge is $166.60 and rated at 12,000 pages. It is written for the finance floor: a networked duplex machine whose busiest weeks are reporting weeks, where the charts must read clearly on both sides of the sheet and the cartridge change is planned like everything else in the close calendar.

