There is no need to be discouraged. Some of them are neither carcinogenic nor mutagenic, such as pimagedine (aminoguanidine) and [2-(dimethylamino)ethyl]hydrazine.
You can search for the MSDS (Material Safety Data Sheet) of various substituted hydrazines and see their toxicity data in sections in Section 2 and Section 11, as well as their environmental impact in Section 12 and see what it fits.
e.g. MSDS Pimagedine Hydrochloride (aminoguanidine HCl),https://www.caymanchem.com/msdss/81530m.pdf
MSDS [2-(dimethylamino)ethyl]hydrazine http://datasheets.scbt.com/sds/aghs/en/sc-340263.pdf
Hint 1: Toxicity/ carcinogenicity, mutagenicity subcategories.
Category 1: Mild/ Suspicious to be but not proven in animals and humans
Category 2: Medium/ Proven in animals but not in humans
Category 3: Severe/ Proven in animals and humans
Hint 2: Roughly, carcinogenicity/mutagenicity category 1 classification permits the commercialization for professional use only but not the use in consumer goods. However, there are exceptions depending on the content whether being < 10% or < 1%, in relation with the subcategory.
Hint 3: Some manufactures/suppliers (e.g. Aldrich) refer to SDS (Safety Data Sheet), regarding the Safety document.
PS: “Osiris” is a useful tool to pre-estimate the toxicity of a chemical substance but you cannot trust a software for the safety of hundreds of tons of that substance. Contrary, what is cited in MSDSs and SDSs, is double checked.