Hydrogen peroxide (H₂O₂) is considered to play important role in the chemistry of ozone layer in the troposphere. It also has been detected first time in the cold environment of a star-forming region towards ρ Oph A. According to the selection rules for dipole allowed transitions, the H₂O₂ ro-torsional levels may be classified into four distinct groups. Using the spectroscopic information (rotational and centrifugal distortion constants, and electric dipole moment), we have calculated energies of lower 50 levels of each group, and radiative transition probabilities for transitions between the levels. Using these radiative transition probabilities along with the collisional rate coefficients (obtained with the help of a scaling law), we have solved, for each group, a set of 50 statistical equilibrium equations coupled with the equations of radiative transfer and have found 16 lines showing anomalous absorption. In addition to four astronomically detected lines, 24 lines are found to show emission features. All these lines may play a significant role for the identification of H₂O₂ in the interstellar medium.

过氧化氢（H ₂ O ₂）被认为在对流层臭氧层化学中起着重要作用。它也已被检测到以星形成区域的冷环境首次向ρ蛇夫座A.根据用于偶极允许跃迁的选择规则，将H ₂ Ò ₂扭转水平可分为四个不同的组。使用光谱信息（旋转和离心畸变常数以及电偶极矩），我们计算了每组低50级能级的能量，以及级间过渡的辐射跃迁几率。利用这些辐射跃迁概率以及碰撞率系数（借助缩放定律获得），我们为每组求解了一组50个统计平衡方程，并结合了辐射传递方程，发现了16条线异常吸收。除了四条天文探测线以外，还发现了24条显示出放射特征的线。所有这些线可能对H ₂ O ₂的识别起重要作用 在星际介质中。