化合物详情

Pesticide Ecotoxicity Data from EPA: 4

Using potassium dichromate as the source for chromium, a BCF of 2.8 (based on chromium) was determined for the muscle tissue of Salmo gairdneri (rainbow trout) over a 180 days duration period(1). According to a classification scheme(2), this BCF range suggests that bioconcentration in aquatic organisms is low(SRC).

The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised not to let the chemical enter into the environment.

NIOSH (NOES Survey 1981-1983) has statistically estimated that 61,073 workers (19,198 of these are female) are potentially exposed to potassium dichromate in the US(1).

Breathing hexavalent chromium can cause irritation to the lining of the nose, nose ulcers, runny nose, and breathing problems, such as asthma, cough, shortness of breath, or wheezing. Ingestion of hexavalent chromium causes irritation and ulcers in the stomach and small intestine, as well as anemia. Skin contact can cause skin ulcers. (L16)

There is no know antidote for chromium poisoning. Exposure is usually handled with symptomatic treatment. (L16)

LD50: 26 mg/kg (Oral Rat) (L16) LD50: 403 mg/kg (Dermal, Rabbit) (L16) LD50: 37 mg/kg (Intraperitoneal, Mouse) (T14) LC50: 35 mg/m3 over 4 hours (Inhalation, Rat) (L16)

Hexavalent chromium is a known carcinogen. Chronic inhalation especially has been linked to lung cancer. Hexavalent chromium has also been know to cause reproductive and developmental defects. (A12)

ACGIH Carcinogen - Confirmed Human.

Inhalation (L16); oral (L16); dermal (L16)

Hexavalent chromium's carcinogenic effects are caused by its metabolites, pentavalent and trivalent chromium. The DNA damage may be caused by hydroxyl radicals produced during reoxidation of pentavalent chromium by hydrogen peroxide molecules present in the cell. Trivalent chromium may also form complexes with peptides, proteins, and DNA, resulting in DNA-protein crosslinks, DNA strand breaks, DNA-DNA interstrand crosslinks, chromium-DNA adducts, chromosomal aberrations and alterations in cellular signaling pathways. It has been shown to induce carcinogenesis by overstimulating cellular regulatory pathways and increasing peroxide levels by activating certain mitogen-activated protein kinases. It can also cause transcriptional repression by cross-linking histone deacetylase 1-DNA methylt...

Intermediate Oral: 0.005 mg/kg/day (L134) Chronic Oral: 0.001 mg/kg/day (L134)

1, carcinogenic to humans. (L135)

LD50 Mouse ip 37 mg/kg

Diffuse eczematous contact dermatitis resulted from exposure in a blueprint worker. Washing every 30 min in sodium bisulfite averted further dermatitis.