I disagree, and please remember that any time I spend commenting on products we don't sell, I have less time to spend on answering questions about products we do sell. But since you insist:
It is really difficult to answer your question because vit. C has to have a low pH to be able to penetrate the skin and I do not know how the added ingredients affected the pH. Our vit. C is pure ascorbic acid. Your vit. C has added ingredients and some may enhance oral penetration but they can also decrease topical penetration. For example, sodium bicarbonate enhances the oral absorption of vit. C but it decreases its topical penetration.
You would have to ask the manufacturer of your pills whether it is suitable for topical penetration. As I said before, I can't be expected to know everything about every product out there, neither can I be expected to put in the research required and write up the answer. Again, I am sorry but the alternative is to close this forum.
But you could for example use your pills in freshly made salads, to prevent the oxidation of vegetables. Dissolve a pill in a little water and add it to your salad, together with dressing. I routinely add vit. C to my salads.
You can of course use it on your skin but I cannot guarantee it will penetrate. I just don't know - it's not our product.
If you split your pill and take a half or a quarter, your stomach will likely be able to handle it. There is no need to take 1 g in one go.