Printer Fit Guarantee
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The TonerBuzz Printer Fit Guarantee ensures that the toner you buy will work with your printer. All you have to do is select your printer from the dropdown above, and we'll let you know if this is the right toner for you.
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C9731A | HP 645A | Original HP Toner Cartridge - Cyan Guaranteed to Work With These Printers:
Product Type:Toner Cartridge
Page Yield:12,000 Pages
Pack Type:Single Pack
Keep your office running smoothly with this high-quality HP 645A Cyan toner cartridge (C9731A). It's reliable and prints at high speed for maximum efficiency.
It also has JetIntelligence technology, which gives you peak performance every time and protects your printer and data.
This original HP LaserJet 645A toner cartridge is perfect for printing high-quality documents at home or in the office. It's reliable and compatible with a range of HP printers.
HP 645A Cyan (C9731A) Page Yield
Genuine HP 645A Cyan LaserJet Toner Cartridge C9731A yields up to 12,000 Pages (based on ISO/IEC 19752 standard). Actual yield varies considerably based on content of printed pages and other factors, but on average you will be able to print 12,000 pages.
Keep churning out documents at high speeds without the need to frequently replace your toner cartridge with this OEM HP toner 645A Cyan.
This toner looks professional on every page with vibrant and vivid images and high-quality prints that stand the test of time.
HP 645A Cyan (C9731A) Compatibility
This Original HP 645A (C9731A) Cyan Laserjet Toner Cartridge is designed to work with the following printers:
- HP Color LaserJet 5500
- HP Color LaserJet 5500n
- HP Color LaserJet 5500dn
- HP Color LaserJet 5500dtn
- HP Color LaserJet 5500hdn
- HP Color LaserJet 5550
- HP Color LaserJet 5550n
- HP Color LaserJet 5550dn
- HP Color LaserJet 5550dtn
- HP Color LaserJet 5550hdn
HP 645A Cyan (C9731A) Quality
Original/OEM HP 645A LaserJet toner cartridge (C9731A) means clear, sharp text and graphics every time you print!
- Quality printing
- Bold and sharp text
- Professional looking graphics
- Fast and reliable printing without affecting the quality
- Higher page yield
- Consistent performance that your Original printer is built for
- Safe for your printer
- Help protect the environment
Additional Information About HP 645A (C9731A)
Package Dimensions: 19.69 x 6.3 x 10.43 inches (50.01 x 16.00 x 26.49 cm)
Package Weight: ~6.38 lb (~2.89 kg)
Manufacturer: Hewlett-Packard (HP)
What's in the box: HP 645A Toner Cartridge Cyan 1 Pack C9731A, Recycling Guide and a free UPS label for easy toner cartridge recycling after use
Package quantity: 1 package
Printer type: Laser printer
Operating temperature range: 59 to 77°F (15 to 25°C)
Operating humidity range: 20 to 80% RH
Storage temperature range: -4 to 104°F (-20 to 40°C)
Storage humidity range: 10 to 90% RH
Cost per page: $0.027
Post-consumer recycled content: 0%
Total recycled content: 17%
Refill: No ❌
Free shipping: ✅
Express shipping: ✅ (extra fee)
Set: ✅ (available here ➜ HP 645A Set)
*Cost per page provided above is an estimate.
Benefits of Using This Original HP 645A Toner Cartridge
✔️ Reliable Printing - Get first-class smooth, consistent printing and avoid common problems with original HP toner cartridges. Crisp graphics, clear printing and high speeds every time.
⚡ High speed - Get high speed printing without sacrificing quality. This original HP toner cartridge is designed for fast, reliable printing.
♻️ Eco-friendly - Use original HP toner cartridges to reduce environmental impact. Original HP toner cartridges are recyclable and help conserve resources.
✔️ No harm to indoor air quality - Get peace of mind knowing that this original HP toner cartridge is designed to avoid the release of potentially dangerous chemicals and is not harmful to the office air quality.
✔️ Printer and Data protection - Protect your HP printer with original HP toner cartridges that are designed to work securely with your printer. Avoid damage to your device or loss of data with this original HP toner cartridge.
✔️ JetIntelligence - Original HP toner cartridges come with a set of innovative features that enhance your printing experience. It also protects against counterfeit cartridges, giving you peace of mind that you're using genuine HP components.
✔️ Authentic HP quality - HP printers need original HP cartridges to deliver the best possible performance. Rely on HP for consistent quality results. This toner cartridge is an original HP product and has been designed specifically for your HP printer to deliver the best printing experience possible.
✔️ Best value - Get the best value for your money with this original HP toner cartridge. Print more pages than ever before, and enjoy consistent quality results.
Saying OEM HP printer cartridges are more reliable than compatible cartridges isn’t an opinion — it’s a fact!
Genuine HP toner cartridges were tested by the independent firm SpencerLab. The SpencerLab Monochrome Reliability Study and the SpencerLab Color Reliability Study were both commissioned by HP.
The color study compared the original HP cartridges with six non-HP brand cartridges. The monochrome study compared original HP black toner cartridges with seven non-HP brand cartridges.
The study found that 98% of non-OEM toner cartridges have some type of reliability issue, like low print quality, premature failure, or dead-on-arrival
All original HP cartridges include tamper-resistant chips, packaging, and firmware.
HP LaserJet printer models 200 and up include FutureSmart firmware 4.5 or higher. This security technology can be found on all HP toner, ink, and PageWide cartridges manufactured for these machines, except for the HP integrated printhead cartridges.
Some security features — like hardware, packaging, and tracking — vary according to the product SKU number.
The Science and Technology Behind HP LaserJet 645A (C9731A) Cartridge
LaserJet printing is one of the most energy and material-efficient types of digital printing to date.
The technology uses a set of cylinders and the power of positive and negative charges to transfer powdery toner particles to paper. Toner is then heated and fused to the paper. The result is the joy of holding slightly warm bunches of freshly-printed documents.
HP 645A Cyan Original LaserJet toner cartridge is a part of the JetIntelligence series – it has a few smart features that make it more cost-efficient, better at producing crisp prints, and easier to use and install.
The technology includes:
Proprietary toner formulas for that vivid, rich cyan of original HP toner cartridges that never gets clogged or messy
Page maximizer technology for high yield printing even with compact cartridges
Print gauge technology that gives you all the information you need to track the health and life cycle of your toner as well as how much toner you have left
Auto seal removal for easier cartridge replacement and safer transport
Anti-fraud technology that helps customers recognize counterfeits and make sure they use Original HP toner cartridges
What Makes C9731A HP 645A Environmentally Friendly?
HP is committed to greener business practices. All original HP toner cartridges produced in recent years are considered more eco-friendly than the competition.
By 2022, Hewlett-Packard has recycled more than 4.9 billion printer cartridges through their recycling program. In addition, the company kept 4.7 billion plastic bottles and 114 million plastic hangers out of landfills.
HP used the recycled material to manufacture new ink and toner cartridges. Their manufacturing model makes them one of the industry leaders when it comes to environmental efforts.
In fact, 100% of HP LaserJet cartridges are made out of up to 75% recycled content, including the 645A. In addition, the packaging for this toner cartridge is made up of 81% recycled materials.
This standard-yield toner cartridge is designed for an already material-efficient technology – HP 645A toner yield is approximately 12,000 pages per cartridge, which is a fairly efficient output.
Compared to most other LaserJet printer cartridges, HP 645A technology has greatly reduced the level of emissions. This will make an office space equipped with HP LaserJet printers less polluted with volatile organic compounds.
In addition, original HP toner cartridges usually have a lower melting point. This way, your printer uses less heat to fuse the toner particles into the paper, making quality printing less energy-consuming.
However, newer Hewlett-Packard printers are often more energy-efficient. Printers released after October 2019 have a newer Energy Star® v3.0. certification with improved performances.
Does HP 645A (C9731A) print black?
No. The HP 645A C9731A is a cyan toner, it doesn't print black. However, HP 645A also comes in Black, Yellow and Magenta.
Learn more about these toner cartridges here:
Is there a 4 pack version of HP 645A toner cartridges?
Yes, you can buy the HP 645A Set (Black, Cyan, Yellow, Magenta) here.
How to replace old HP LaserJet 645A cartridge with the new one?
• Lift the scanner and top cover
• Lift the old toner cartridge out by the middle handle
• Remove new toner from packaging
• Line the new cartridge up with the mounting slots
• Slide the new cartridge into place, holding it by the middle handle
• Close the top cover and scanner
How long does C9731A toner last?
C9731A toner cartridges are designed to last for up to 12,000 pages. However, the actual number of pages you'll get from a cartridge will depend on a number of factors, such as the amount of text/graphics per page and the print settings you've selected.
How often do I have to replace my original LaserJet HP 645A C9731A toner cartridge?
HP 645A C9731A has a standard page yield of 12,000 pages - that's a lot of printed pages!
The actual yield varies considerably based on content of printed pages and other factors.
Heavier printing will use more toner and the cartridge will need to be replaced more frequently. Standard or light printing on the other hand will use less toner and the cartridge will last longer.
How do I know when my HP 645A C9731A toner is running low?
Your printer will display a "toner low" or "replace toner" message when your cartridge is running low on toner. It's a good idea to keep a spare cartridge on hand so you don't have to worry about running out of toner in the middle of a print job.
Does HP645A toner expire or dry up?
No. If properly stored in the original packaging, HP 645A cartridges will not dry up or expire.
What is the shelf life of HP 645A C9731A toner cartridge?
If stored properly in the original packaging, HP645A cartridges have an indefinite shelf life. However, it is best to use them within 6 months of purchase to ensure optimal print quality.
How do I store my HP 645A C9731A toner?
Toner cartridges should be stored in a cool, dry place. Avoid extreme temperatures and direct sunlight. If you are not using your cartridge right away, store it in its original packaging. This will help to preserve the quality of the toner.
Why does this toner cartridge have two codes? What is the difference between HP 645A and C9731A?
HP naming conventions are a bit funky, but, in a nutshell, HP645A Cyan is the product name (or model number) and C9731A is the product number.
How much does it cost to print with HP 645A Cyan LaserJet toner cartridge?
The cost per page for 645A Cyan is $0.027.
Learn more about calculating your printing costs here.
Can I print at high speeds with HP 645A Cyan (C9731A)?
The HP 645A (C9731A) is a toner cartridge specifically designed for use in printers that are capable of high speeds and high-quality printing. So, yes, you can print at high speeds with HP 645A and it will print faster than a standard inkjet printer. However, the specific speed will still vary depending on the printer model that you are using.
How to get maximum page yield from HP 645A C9731A toner?
To get the most pages out of your HP 645A, print in Draft or Normal mode rather than High Quality mode. You can also choose to print in grayscale rather than color, which will use less toner.
To further reduce the amount of toner used, consider a toner-saving font. Check our article here to learn what font is the most cost-effective one (we tested seven of the most popular economical fonts in the real-world conditions to find out the answer).
Do I need to shake my 645A C9731A HP cartridge before installing it?
Although not necessary, it still can be a good idea to shake your HP 645A cartridge before installing it. This will help to distribute the toner evenly and avoid streaks or spots on your printed pages.
How do I dispose of my HP 645A C9731A toner cartridge?
Original HP toner cartridges can be recycled or disposed of through HP's Planet Partners program. Contact your local recycling center to see if they participate in the program. You can also visit HP's website for more information on recycling options.
What is the HP 645A warranty?
Toner Buzz offers the best warranty in the industry!
- within 30 days of installation, and
- within a year of purchase date.
If you experience any issues with your HP 645A cartridge, simply contact our customer service for assistance.
For more information, please check our Return Policy here.
What is the shipping cost for 645A toner cartridges?
We offer free shipping on all orders.
For more details please check our Shipping Policy here.
When will my HP 645A Cyan order ship?
Most orders ship the same day when placed before 5 PM EST. Please check the shipping calculator in the right side panel of this page for an accurate estimate.
What are the payment options for 645A toner cartridges?
Toner Buzz accepts major credit cards, PayPal, and Amazon Payments.
Can I use 645A HP toner in other printers?
No, HP 645A toner is not compatible with other printers.
Can I use compatible or remanufactured HP 645A Cyan toner cartridges?
It's always best to use genuine HP cartridges to ensure optimal print quality and reliability. Using a remanufactured toner cartridge or non-compatible/poorly manufactured replacement cartridge can damage your printer and void your warranty.
Learn more about it here.
Still have questions?
Our customer service team is happy to help. Give us a call at 1-800-203-8411 or send us an email at [email protected]