Originally Posted by swisscheese
I've been under the impression bap is dangerous/carcinogen and wouldn't want it in my medical garden.
well its an understandable fear but you've been under the wrong impression. BAP is used to grow apples, pistachios, spinach, and other crops regularly
here's the toxocology info on bap
Inhalation, rat: LC50 = 5.2 gm/m3;
Oral, mouse: LD50 = 1300 mg/kg;
Oral, rat: LD50 = 2125 mg/kg;
Oral, rat: LD50 = 1.3 gm/kg;
Skin, rabbit: LD50 = 5 gm/kg;
with a spray solution at 40-100 mg per liter, BAP only shows slight danger to the person working with the solution, and no danger for people consuming crops.
"In acute toxicity studies, N6-Benzyladenine is slightly toxic by the oral route and produces moderate eye irritation; it has been placed in Toxicity Category III (the second-to-lowest of four categories) for these effects. It is of relatively low acute dermal and inhalation toxicity, and is only a slight irritant to the skin; it has been placed in Toxicity Category IV for these effects. N6-Benzyladenine does not appear to be a skin sensitizer or mutagenic.
In a subchronic toxicity study using rats, N6-Benzyladenine caused decreased food consumption, decreased body weight gain, increased blood urea nitrogen, and minimal changes in kidney tissue. It shows some evidence of causing developmental toxicity and maternal toxicity.
Although N6-Benzyladenine has two food crop-related uses (on fruit- bearing apple trees and spinach grown for seed), it is exempt from the requirement of a tolerance because it is a biochemical pesticide used at a rate of less than 20 grams of active ingredient per acre. Therefore, the Agency will revoke the existing tolerance and establish an exemption from the requirement of a tolerance for the currently registered uses of this pesticidal compounds on apples and spinach.
Because the use rate is low and application precedes harvest by approximately four months, the potential for dietary exposure is considered to be negligible.
Occupational and Residential Exposure
Pesticide workers (mixers, loaders and applicators) may be exposed to N6-Benzyladenine during application. Dermal exposure is expected to be moderate to high for workers who open, pour, mix and load the pesticide, and to applicators using hand sprayers and air blast equipment.
To reduce worker exposure, EPA is requiring use of the personal protective equipment (PPE) and Restricted Entry Interval set forth in the Agency's Worker Protection Standard (WPS). Because formulated products that contain N6-Benzyladenine are in Toxicity Category II, use of the following PPE is required: long-sleeved shirt and pants, socks, chemical- resistant footwear, chemical-resistant gloves, respiratory protection devices, and protective eyewear. Although the PPE requirement is based on the acute toxicity of the end-use product, it will mitigate exposure substantially and thus will serve to protect pesticide handlers from potential developmental toxicity effects. Further, the Restricted Entry Interval of 12 hours set forth in the WPS will be required, reducing the risks of post- application exposure to benzyladenine.
Human Risk Assessment
N6-Benzyladenine is of moderate to relatively low acute toxicity, but has been demonstrated to cause developmental toxicity and maternal toxicity in laboratory animals. The potential for dietary exposure is negligible. Applicator exposure and risk of developmental and maternal toxicity will be reduced through use of personal protective equipment (PPE) and the Restricted Entry Interval (REI) set forth in the Worker Protection Standard (WPS)."
and here's another link that show the changes made to these limitations:
basically just lessening the restrictions even further. BAP isn't a really dangerous substance, however handling the stock solutions and working solutions could be fairly toxic due to potassium hydroxide, sodium hydroxide or other caustic chemicals. so there are precautions when working with BAP that have to be respected (skin, eye, respiratory protection when spraying), but other than that, BAP used properly does not have health risks for us.