27.07.2013 Views

hexachlorobutadiene - Davidborowski.com

hexachlorobutadiene - Davidborowski.com

hexachlorobutadiene - Davidborowski.com

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

TABLE 2-2. Levels of Significant Exposure to Hexachlorobutadiene - Oral<br />

Exposure/<br />

LOAEL (effect)<br />

Key to duration/ NOAEL Less serious<br />

Serious<br />

Species Route frequency System (mg/kg/day) (mg/kg/day) (mg/ kg/day)<br />

figure a<br />

ACUTE EXPOSURE<br />

Systemic<br />

1 Rat (F) 14 d Hepatic 35<br />

Renal<br />

INTERMEDIATE EXPOSURE<br />

Systemic<br />

2 Rat (GO) 13 wk<br />

Other<br />

Hepatic<br />

Hemato<br />

Renal<br />

Other<br />

3 Rat (F) 30 d Resp<br />

Cardio<br />

Gastro<br />

Hemato<br />

Hepatic<br />

Renal<br />

Other<br />

2.5<br />

15.6<br />

1<br />

2.5<br />

100<br />

100<br />

100<br />

3<br />

10<br />

10<br />

100<br />

4.6 (proximal<br />

convoluted tubule<br />

degeneration)<br />

4.4 (body weight<br />

reduced 9.5% in<br />

females)<br />

6.3 (increased<br />

cytoplasmic<br />

basophilia)<br />

2.5 (degeneration<br />

proximal tubules)<br />

10 (increased hemoglobin<br />

concentration)<br />

30 (centri lobular<br />

hepatocellular<br />

swelling)<br />

30 (tubular<br />

degeneration,<br />

necrosis)<br />

(thyroid, para-<br />

thyroid, pituitary<br />

and adrenal glands)<br />

6.3 (body weight<br />

decreased 29% in<br />

females and 13%<br />

in males)<br />

Reference<br />

Harleman and<br />

Seinen 1979<br />

Harleman and<br />

Seinen 1979<br />

Kociba et al.<br />

1971<br />

2. HEALTH EFFECTS<br />

HEXACHLOROBUTADIENE 18

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!