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HP 645A C9731A Cyan Original Toner Cartridge


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HP 645A | C9731A, Cyan Original Toner Cartridge, 12000 pages. Compatible with : Color LaserJet 5500, 5550

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Consider two important things when buying a C9731A toner cartridge

CPT Rate (Cost Per Thousand pages printed)

As every toner cartridge will have its own unique yield (pages printed per toner cartridge) for a specific price, the only accurate way to compare the real cost of the C9731A toner is by CPT. CPT is very easy to calculate.

CPT = Price ÷ Yield x 1000

CPT is the most important factor in helping to lower your printing costs.

CPT rates vary significantly by toner cartridge with different yields ( usually there are at least 2 different versions of a toner cartridge with different yields) for a specific laser printer.

CPT rates can vary by more than 100% when comparing them between different printer models you may already own or are considering buying.


Once the CPT rate for a printer is established and the toner cartridge with the lowest CPT rate has been chosen, then tracking the achieved yield per cartridge and the rate of use is going to provide the biggest savings opportunity.

Free printer software exists that will monitor your printer(s) and provide the number of pages that each and every toner cartridge has printed, the dates of installation or replacement and most importantly, if one printer with a higher CPT rate is being used more than a printer with a lower CPT rate.

Printer monitoring software can provide many additional features, such as alerting you by email when you require toner.

If you are interested in obtaining free printer monitoring software please click here to contact us.

Data sheet

Page yield 12000 pages
Compatible products Color LaserJet 5500, 5550
Printing colours Cyan
Quantity 1
Print technology Laser
Operating relative humidity (H-H) 20 - 80%
Storage temperature (T-T) -20 - 40 °C
Operating temperature (T-T) 15 - 25 °C
Package weight 2.9 kg
Type Cartridge
Package width 50 cm
Package height 26.5 cm
Brand compatibility HP
Package length 16 cm

More info

HP Color Laserjet 5500/5550 Printing Supplies with Smart Printing Technology 1 get the best results out of your HP printing system and work with your printer to deliver accurate, consistent colour and reliable, cost-effective performance.HP 645A. Type: Cartridge, Page yield: 12000 pages, Printing colours: Cyan. Package width: 50 cm, Package height: 26.5 cm, Package weight: 2.9 kg
Page yield12000 pages
Printing coloursCyan
Print technologyLaser
Brand compatibilityHP
Compatible productsColor LaserJet 5500, 5550
Operating temperature (T-T)15 - 25 °C
Operating relative humidity (H-H)20 - 80%
Storage temperature (T-T)-20 - 40 °C
Package width50 cm
Package height26.5 cm
Package weight2.9 kg
Package length16 cm


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HP 645A C9731A Cyan Original Toner Cartridge

HP 645A C9731A Cyan Original Toner Cartridge

HP 645A | C9731A, Cyan Original Toner Cartridge, 12000 pages. Compatible with : Color LaserJet 5500, 5550
* For next day delivery, orders must be placed before 4pm EST. Excludes heavy printers & remote areas. Subject to transportation companies delivery schedules.

* Free delivery excludes heavy printers, special delivery instructions and remote areas.