Cyromazine:  Comparison of US Tolerances (40 CFR 180.414) and Various
MRLs

Residue Definition

US	Codex	Canada	Mexico	European Union

Cyromazine	Cyromazine (1992 CCPR specifically excluded melamine from the
defn)	N-cyclopropyl-1,3,5-

triazine-2,4,6-triamine,

including the metabolite

1,3,5-triazine-2,4,6-

triamine 

	Cyromazina	Cyromazine1



1 Currently undergoing review.  The most recent decisions (from the NL)
indicate that the residue of concern for both enforcement and dietary
intake considerations is cyromazine only.  Melamine was judged to have
no significant toxicological concerns.

Commodity (US)	US Tolerance (ppm)	Codex MRL

(mg/kg)	Canada MRL

(mg/kg)	Mexico MRL

(mg/kg)	EU

(mg/kg)

Beans, dry, except cowpea	3.0





Beans, lima	1.0



Beans and peas  with pod (fresh)

5

Broccoli	1.0





Cabbage, Abyssinian	10.0





Cabbage, seakale	10.0





Cattle, fat	0.05





Cattle, kidney	0.2





Cattle, meat	0.05



0.05

Cattle, meat byproducts, except kidney	0.05



0.05

Egg	0.25	0.21

	0.2

Garlic, bulb	0.2





Garlic, great-headed, bulb	0.2





Goat, fat	0.05





Goat, kidney	0.2





Goat, meat	0.05



0.05

Goat, meat byproducts, except kidney	0.05



0.05

Hanover salad, leaves	10.0





Hog, fat	0.05



0.05

Hog, kidney	0.2





Hog, meat	0.05





Hog, meat byproducts, except kidney	0.05



0.05

Horse, fat	0.05





Horse, kidney	0.2





Horse, meat	0.05



0.05

Horse, meat byproducts, except kidney	0.05





Leafy vegetables (except Brassica)	7.0	Lettuce, head 5.

Celery 5.	Leaf lettuce 10.0

Celery  10.0

Spinach 10.0

Head lettuce 4.0	Lettuce 5	Lettuce 15

Celery 2

Cress 15

Leek	3.0





Mango	0.3

	3

	Milk	0.05	0.01 (*)1

	0.02

Mushroom	1.0	5.	8.0

5.

Onion, dry bulb	0.2

0.3



Onion, green	3.0

3.0



Onion, potato	3.0





Onion, tree	3.0





Onion, welsh	3.0





Pepper	1.0	1.	3.0	Chile pepper 4

	Potato	0.8

0.5

Dry potato products 1.5

Early potato 1

Ware potato 1

Poultry, fat (from chicken layer hens and chicken breeder hens only)
0.05



0.05

Poultry, meat (from chicken layer hens and chicken breeder hens only)
0.05	0.05 (*)1

	0.05

Poultry, meat byproducts (from chicken layer hens and chicken breeder
hens only)	0.05



0.05

Rakkyo, bulb	0.2





Shallot, bulb	0.2





Shallot, fresh leaves	3.0





Sheep, fat	0.05





Sheep, kidney	0.2





Sheep, meat2	0.05	0.05 (*)1

	0.05

Sheep, meat byproducts except kidney	0.05



0.05

Tomato	0.5	0.5	1.0	1	1

Turnip greens	10.0





Vegetable, brassica, leafy, group 5, except broccoli	10.0





Vegetable, cucurbit, group 9	1.0	Cucumbers 0.2

Melons (except watermelon) 0.2	Cucumbers 1.0

Melons 1.0	Melons 2

Watermelon 2

Cucumber 2

Squash 2 	Watermelon

0.3

Cucumber 1

Gherkins 1

Courgettes 1

Melons 0.3



Inadvertent Residues

Cotton, undelinted seed	0.1





Corn, sweet, kernels plus cob with husks removed	0.5



0.05

Corn, sweet, forage	0.5





Corn, sweet, stover	0.5





Radish, root	0.5



0.05

Radish, tops (leaves)	0.5



0.05

1 MRL accommodates external animal treatment.

2 New Zealand 0.3 mg/kg from topical application.

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