HP 641A
The Color LaserJet 4600, 4610 and 4650 lines were departmental workhorses, and every one of them feeds from the HP 641A family: C9720A in black, C9721A in cyan, C9722A in yellow and C9723A in magenta. Four separate cartridges sit in a row inside these machines, so a drained color never forces you to throw away the other three. A higher-capacity black, sold as 641X (C9720X), is also listed on this shelf for offices that run long text documents between color jobs.
What keeps these printers in service is the size of the jobs they swallow: monthly reports, training binders, presentation decks with full-bleed charts. Color registration on the 4600 and 4650 series depends on all four cartridges seating cleanly, which is why tired units show up first as fuzzy edges on graphics rather than blank pages. Replacing the single cartridge the panel names, instead of the whole row, is the normal rhythm with this family — and keeping one spare black on the shelf covers the far more common emergency, an empty black on deadline day.
Toner Cartridges for HP 641A
| Cartridge | Color | Yield |
| C9720A black cartridge | Black | See product page |
| C9721A cyan cartridge | Cyan | See product page |
| C9722A yellow cartridge | Yellow | See product page |
| C9723A magenta cartridge | Magenta | See product page |
| 641X (C9720X) black cartridge | Black | See product page |
| 641A 4 Color Set | Black, cyan, yellow, magenta | See product page |
| 641A (C9722A) yellow cartridge, alternate listing | Yellow | See product page |
The same four codes are also stocked under the individual printer names, for shoppers who search by machine instead of by cartridge: 4600 Toner Cartridges 4 Color Set; 4650 (C9720A) Toner Cartridge 2 Black; 4650 (C9721A, C9722A, C9723A) Toner Cartridge 3 Color Set; 4650 (C9720A, C9721A, C9723A, C9722A) Toner Cartridge 5 Color Set; 4650 (C9721A) Toner Cartridge Cyan; 4650 (C9723A) Toner Cartridge Magenta; 4650 (C9722A) Toner Cartridge Yellow; 4650dn (C9720A) Toner Cartridge 2 Black; 4650dn (C9721A, C9722A, C9723A) Toner Cartridge 3 Color Set; 4650dn (C9720A) Toner Cartridge Black; 4650dn (C9721A) Toner Cartridge Cyan; 4650dn (C9722A) Toner Cartridge Yellow; 4650n (C9723A) Toner Cartridge Magenta; 4610n (C9720A, C9721A, C9723A, C9722A) Toner Cartridge 4 Color Set; 4650 (C9720A, C9721A, C9723A, C9722A) Toner Cartridge 4 Color Set; 4650dn (C9720A, C9721A, C9723A, C9722A) Toner Cartridge 4 Color Set; 4650n (C9720A, C9721A, C9723A, C9722A) Toner Cartridge 4 Color Set; 4600 (C9723A) Toner Cartridge Magenta; 4600dn (C9721A) Toner Cartridge Cyan; 4600hdn (C9723A) Toner Cartridge Magenta.
Which cartridge should you buy?
Start with what the printer is asking for. A single low color on a machine that mostly prints documents calls for that one cartridge and nothing more. The four-color set earns its place when several channels are near empty at once, or when a 4600 or 4650 is about to start a long color run and you want every channel fresh at the same starting line. Heavy text volume points at the 641X black, which stretches the interval between black swaps. Every cartridge on this page is a compatible replacement carrying a 1-year warranty and 1-year returns, so the choice is about buying pattern, not about risk.
Chip, toner and everyday use
These are mature machines with mature cartridge electronics: the printer reads the cartridge chip, reports its level estimate, and expects a recognized cartridge in each slot. Pull the sealing tape fully, seat the unit until it clicks, and let the printer run its calibration before judging the first pages. Toner powder settles in storage, so a gentle rock of a cartridge that has sat for months wakes it up. Store spares upright, in the box, away from heat — a supply closet shelf, not the top of the printer.
Frequently Asked Questions
Will one 641A set fit both a 4600 and a 4650?
Yes. The 4600, 4610 and 4650 series all draw from this same family — C9720A black with C9721A, C9722A and C9723A colors — so the cartridges move between those machines freely. Match the code on the cartridge you pull out if you are ever unsure.
Is the 641X a different fit from the 641A black?
No — the 641X (C9720X) is the higher-capacity black for the same slot. It installs exactly like the standard C9720A and simply runs longer between changes, which suits offices printing heavy text volume.
My prints show one color fading at the edges. Do I need the whole set?
Almost never. Edge fade in a single color points at that one cartridge running low or seating poorly. Pull it, rock it gently to redistribute the toner, and reseat it; if the fade stays, replace that color alone.
Are these genuine HP cartridges?
No. Everything on this shelf is a compatible replacement built for the 641A family, covered by a 1-year warranty and 1-year returns.
More printers that use the same cartridges
Every model in the 4600 and 4650 families below runs on this same cartridge set: Color LaserJet 4650N, Color LaserJet 4650HDN, Color LaserJet 4650DTN, Color LaserJet 4650DN, Color LaserJet 4650, Color LaserJet 4610N, Color LaserJet 4610, Color LaserJet 4600N, Color LaserJet 4600HDN, Color LaserJet 4600DTN, Color LaserJet 4600DN, Color LaserJet 4600.